diff --git a/beacon_chain/beacon_chain_db_immutable.nim b/beacon_chain/beacon_chain_db_immutable.nim
index 2b3aef7c0d..7d0dedd8e6 100644
--- a/beacon_chain/beacon_chain_db_immutable.nim
+++ b/beacon_chain/beacon_chain_db_immutable.nim
@@ -130,7 +130,7 @@ type
     current_sync_committee*: SyncCommittee     # [New in Altair]
     next_sync_committee*: SyncCommittee        # [New in Altair]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#beaconstate
   # Memory-representation-equivalent to a Bellatrix BeaconState for in-place SSZ
   # reading and writing
   BellatrixBeaconStateNoImmutableValidators* = object
diff --git a/beacon_chain/beacon_clock.nim b/beacon_chain/beacon_clock.nim
index 3aec4e75b1..a65f2fd99c 100644
--- a/beacon_chain/beacon_clock.nim
+++ b/beacon_chain/beacon_clock.nim
@@ -27,7 +27,7 @@ type
     ## which blocks are valid - in particular, blocks are not valid if they
     ## come from the future as seen from the local clock.
     ##
-    ## https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/fork-choice.md#fork-choice
+    ## https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/fork-choice.md#fork-choice
     ##
     # TODO consider NTP and network-adjusted timestamps as outlined here:
     #      https://ethresear.ch/t/network-adjusted-timestamps/4187
diff --git a/beacon_chain/consensus_object_pools/blockchain_dag.nim b/beacon_chain/consensus_object_pools/blockchain_dag.nim
index 0cecc7f128..1d257a2c94 100644
--- a/beacon_chain/consensus_object_pools/blockchain_dag.nim
+++ b/beacon_chain/consensus_object_pools/blockchain_dag.nim
@@ -1178,7 +1178,7 @@ proc init*(T: type ChainDAGRef, cfg: RuntimeConfig, db: BeaconChainDB,
   # should have `previous_version` set to `current_version` while
   # this doesn't happen to be the case in network that go through
   # regular hard-fork upgrades. See for example:
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#testing
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#testing
   if stateFork.current_version != configFork.current_version:
     error "State from database does not match network, check --network parameter",
       tail = dag.tail, headRef, stateFork, configFork
@@ -1972,7 +1972,7 @@ proc pruneBlocksDAG(dag: ChainDAGRef) =
     prunedHeads = hlen - dag.heads.len,
     dagPruneDur = Moment.now() - startTick
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/sync/optimistic.md#helpers
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/sync/optimistic.md#helpers
 func is_optimistic*(dag: ChainDAGRef, bid: BlockId): bool =
   let blck =
     if bid.slot <= dag.finalizedHead.slot:
diff --git a/beacon_chain/consensus_object_pools/spec_cache.nim b/beacon_chain/consensus_object_pools/spec_cache.nim
index 3235465598..9749fe764b 100644
--- a/beacon_chain/consensus_object_pools/spec_cache.nim
+++ b/beacon_chain/consensus_object_pools/spec_cache.nim
@@ -53,7 +53,7 @@ iterator get_beacon_committee*(
     committees_per_slot * SLOTS_PER_EPOCH
   ): yield (index_in_committee, idx)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#get_beacon_committee
 func get_beacon_committee*(
     shufflingRef: ShufflingRef, slot: Slot, committee_index: CommitteeIndex):
     seq[ValidatorIndex] =
diff --git a/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim b/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim
index 89fc6ce7e1..42b147f93d 100644
--- a/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim
+++ b/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim
@@ -364,7 +364,7 @@ proc produceSyncAggregate*(
 
 proc isEpochLeadTime*(
     pool: SyncCommitteeMsgPool, epochsToSyncPeriod: uint64): bool =
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#sync-committee-subnet-stability
   # This ensures a uniform distribution without requiring additional state:
   # (1/4)                         = 1/4, 4 slots out
   # (3/4) * (1/3)                 = 1/4, 3 slots out
diff --git a/beacon_chain/el/merkle_minimal.nim b/beacon_chain/el/merkle_minimal.nim
index 1fe051b2c2..8c93a6e306 100644
--- a/beacon_chain/el/merkle_minimal.nim
+++ b/beacon_chain/el/merkle_minimal.nim
@@ -7,7 +7,7 @@
 
 {.push raises: [].}
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/tests/core/pyspec/eth2spec/utils/merkle_minimal.py
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/tests/core/pyspec/eth2spec/utils/merkle_minimal.py
 
 # Merkle tree helpers
 # ---------------------------------------------------------------
diff --git a/beacon_chain/fork_choice/fork_choice.nim b/beacon_chain/fork_choice/fork_choice.nim
index 9f22b87f71..5d17d86f11 100644
--- a/beacon_chain/fork_choice/fork_choice.nim
+++ b/beacon_chain/fork_choice/fork_choice.nim
@@ -109,7 +109,7 @@ proc update_justified(
   self.update_justified(dag, blck, justified.epoch)
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/fork-choice.md#update_checkpoints
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/fork-choice.md#update_checkpoints
 proc update_checkpoints(
     self: var Checkpoints, dag: ChainDAGRef,
     checkpoints: FinalityCheckpoints): FcResult[void] =
diff --git a/beacon_chain/gossip_processing/block_processor.nim b/beacon_chain/gossip_processing/block_processor.nim
index 15c0ffeaf7..f6e845b668 100644
--- a/beacon_chain/gossip_processing/block_processor.nim
+++ b/beacon_chain/gossip_processing/block_processor.nim
@@ -840,7 +840,7 @@ proc processBlock(
     # - MUST NOT optimistically import the block.
     # - MUST NOT apply the block to the fork choice store.
     # - MAY queue the block for later processing.
-    # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/sync/optimistic.md#execution-engine-errors
+    # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/sync/optimistic.md#execution-engine-errors
     await sleepAsync(chronos.seconds(1))
     self[].enqueueBlock(
       entry.src, entry.blck, entry.blobs, entry.resfut, entry.maybeFinalized,
diff --git a/beacon_chain/gossip_processing/gossip_validation.nim b/beacon_chain/gossip_processing/gossip_validation.nim
index 1f2e3dd35c..59db188c9c 100644
--- a/beacon_chain/gossip_processing/gossip_validation.nim
+++ b/beacon_chain/gossip_processing/gossip_validation.nim
@@ -303,7 +303,7 @@ template validateBeaconBlockBellatrix(
   #
   # `is_merge_transition_complete(state)` tests for
   # `state.latest_execution_payload_header != ExecutionPayloadHeader()`, while
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#block-processing
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#block-processing
   # shows that `state.latest_execution_payload_header` being default or not is
   # exactly equivalent to whether that block's execution payload is default or
   # not, so test cached block information rather than reconstructing a state.
@@ -1187,7 +1187,7 @@ proc validateAggregate*(
 
   ok((attesting_indices, sig))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/p2p-interface.md#bls_to_execution_change
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/capella/p2p-interface.md#bls_to_execution_change
 proc validateBlsToExecutionChange*(
     pool: ValidatorChangePool, batchCrypto: ref BatchCrypto,
     signed_address_change: SignedBLSToExecutionChange,
diff --git a/beacon_chain/libnimbus_lc/libnimbus_lc.h b/beacon_chain/libnimbus_lc/libnimbus_lc.h
index 268ead32ec..edc061c135 100644
--- a/beacon_chain/libnimbus_lc/libnimbus_lc.h
+++ b/beacon_chain/libnimbus_lc/libnimbus_lc.h
@@ -94,7 +94,7 @@ typedef struct ETHConsensusConfig ETHConsensusConfig;
  *         based on the given `config.yaml` file content - If successful.
  * @return `NULL` - If the given `config.yaml` is malformed or incompatible.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/configs/README.md
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/configs/README.md
  */
 ETH_RESULT_USE_CHECK
 ETHConsensusConfig *_Nullable ETHConsensusConfigCreateFromYaml(const char *configFileContent);
@@ -151,9 +151,9 @@ typedef struct ETHBeaconState ETHBeaconState;
  *
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/beacon-chain.md#beaconstate
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#beaconstate
- * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#beaconstate
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#beaconstate
  * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/beacon-chain.md#beaconstate
- * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/configs/README.md
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/configs/README.md
  */
 ETH_RESULT_USE_CHECK
 ETHBeaconState *_Nullable ETHBeaconStateCreateFromSsz(
@@ -325,8 +325,8 @@ typedef struct ETHLightClientStore ETHLightClientStore;
  *
  * @see https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientBootstrap
  * @see https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Events/eventstream
- * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/light-client.md
- * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/weak-subjectivity.md#weak-subjectivity-period
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/light-client/light-client.md
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/weak-subjectivity.md#weak-subjectivity-period
  */
 ETH_RESULT_USE_CHECK
 ETHLightClientStore *_Nullable ETHLightClientStoreCreateFromBootstrap(
@@ -579,7 +579,7 @@ typedef struct ETHLightClientHeader ETHLightClientHeader;
  *
  * @return Latest finalized header.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
  */
 ETH_RESULT_USE_CHECK
 const ETHLightClientHeader *ETHLightClientStoreGetFinalizedHeader(
@@ -598,7 +598,7 @@ const ETHLightClientHeader *ETHLightClientStoreGetFinalizedHeader(
  * @return Whether or not the next sync committee is currently known.
  *
  * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/sync-protocol.md#is_next_sync_committee_known
- * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/light-client.md
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/light-client/light-client.md
  */
 ETH_RESULT_USE_CHECK
 bool ETHLightClientStoreIsNextSyncCommitteeKnown(const ETHLightClientStore *store);
diff --git a/beacon_chain/libnimbus_lc/libnimbus_lc.nim b/beacon_chain/libnimbus_lc/libnimbus_lc.nim
index 71d266d04d..21b4ce925f 100644
--- a/beacon_chain/libnimbus_lc/libnimbus_lc.nim
+++ b/beacon_chain/libnimbus_lc/libnimbus_lc.nim
@@ -77,7 +77,7 @@ proc ETHConsensusConfigCreateFromYaml(
   ## * `NULL` - If the given `config.yaml` is malformed or incompatible.
   ##
   ## See:
-  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/configs/README.md
+  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/configs/README.md
   let cfg = RuntimeConfig.new()
   try:
     cfg[] = readRuntimeConfig($configFileContent, "config.yaml")[0]
@@ -143,9 +143,9 @@ proc ETHBeaconStateCreateFromSsz(
   ## See:
   ## * https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/beacon-chain.md#beaconstate
   ## * https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#beaconstate
-  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#beaconstate
+  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#beaconstate
   ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/beacon-chain.md#beaconstate
-  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/configs/README.md
+  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/configs/README.md
   let
     consensusFork = ConsensusFork.decodeString($consensusVersion).valueOr:
       return nil
@@ -328,8 +328,8 @@ proc ETHLightClientStoreCreateFromBootstrap(
   ## See:
   ## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientBootstrap
   ## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Events/eventstream
-  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/light-client.md
-  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/weak-subjectivity.md#weak-subjectivity-period
+  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/light-client/light-client.md
+  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/weak-subjectivity.md#weak-subjectivity-period
   let
     mediaType = MediaType.init($mediaType)
     consensusFork = ConsensusFork.decodeString($consensusVersion).valueOr:
@@ -755,7 +755,7 @@ func ETHLightClientStoreIsNextSyncCommitteeKnown(
   ##
   ## See:
   ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/sync-protocol.md#is_next_sync_committee_known
-  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/light-client.md
+  ## * https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/light-client/light-client.md
   store[].is_next_sync_committee_known
 
 func ETHLightClientStoreGetOptimisticHeader(
diff --git a/beacon_chain/networking/eth2_network.nim b/beacon_chain/networking/eth2_network.nim
index cc01555f19..59a734b1af 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -2555,7 +2555,7 @@ proc updateStabilitySubnetMetadata*(node: Eth2Node, attnets: AttnetBits) =
   node.metadata.seq_number += 1
   node.metadata.attnets = attnets
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/p2p-interface.md#attestation-subnet-subscription
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/p2p-interface.md#attestation-subnet-subscription
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#attestation-subnet-bitfield
   let res = node.discovery.updateRecord({
     enrAttestationSubnetsField: SSZ.encode(node.metadata.attnets)
@@ -2568,7 +2568,7 @@ proc updateStabilitySubnetMetadata*(node: Eth2Node, attnets: AttnetBits) =
     debug "Stability subnets changed; updated ENR attnets", attnets
 
 proc updateSyncnetsMetadata*(node: Eth2Node, syncnets: SyncnetBits) =
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#sync-committee-subnet-stability
   if node.metadata.syncnets == syncnets:
     return
 
diff --git a/beacon_chain/nimbus_beacon_node.nim b/beacon_chain/nimbus_beacon_node.nim
index d0b047040e..e487af3440 100644
--- a/beacon_chain/nimbus_beacon_node.nim
+++ b/beacon_chain/nimbus_beacon_node.nim
@@ -1906,7 +1906,7 @@ proc installMessageValidators(node: BeaconNode) =
                 MsgSource.gossip, msg)))
 
       when consensusFork >= ConsensusFork.Capella:
-        # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/p2p-interface.md#bls_to_execution_change
+        # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/capella/p2p-interface.md#bls_to_execution_change
         node.network.addAsyncValidator(
           getBlsToExecutionChangeTopic(digest), proc (
             msg: SignedBLSToExecutionChange
diff --git a/beacon_chain/rpc/rest_config_api.nim b/beacon_chain/rpc/rest_config_api.nim
index 147fd7dab9..4831199a7d 100644
--- a/beacon_chain/rpc/rest_config_api.nim
+++ b/beacon_chain/rpc/rest_config_api.nim
@@ -92,7 +92,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           MAX_VOLUNTARY_EXITS:
             Base10.toString(MAX_VOLUNTARY_EXITS),
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/mainnet/altair.yaml
+          # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/mainnet/altair.yaml
           INACTIVITY_PENALTY_QUOTIENT_ALTAIR:
             Base10.toString(INACTIVITY_PENALTY_QUOTIENT_ALTAIR),
           MIN_SLASHING_PENALTY_QUOTIENT_ALTAIR:
@@ -108,7 +108,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           UPDATE_TIMEOUT:
             Base10.toString(UPDATE_TIMEOUT),
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/mainnet/bellatrix.yaml
+          # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/mainnet/bellatrix.yaml
           INACTIVITY_PENALTY_QUOTIENT_BELLATRIX:
             Base10.toString(INACTIVITY_PENALTY_QUOTIENT_BELLATRIX),
           MIN_SLASHING_PENALTY_QUOTIENT_BELLATRIX:
@@ -124,7 +124,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           MAX_EXTRA_DATA_BYTES:
             Base10.toString(uint64(MAX_EXTRA_DATA_BYTES)),
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/mainnet/capella.yaml
+          # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/mainnet/capella.yaml
           MAX_BLS_TO_EXECUTION_CHANGES:
             Base10.toString(uint64(MAX_BLS_TO_EXECUTION_CHANGES)),
           MAX_WITHDRAWALS_PER_PAYLOAD:
diff --git a/beacon_chain/spec/beacon_time.nim b/beacon_chain/spec/beacon_time.nim
index 868620efdc..62466ea9ff 100644
--- a/beacon_chain/spec/beacon_time.nim
+++ b/beacon_chain/spec/beacon_time.nim
@@ -43,7 +43,7 @@ const
   GENESIS_SLOT* = Slot(0)
   GENESIS_EPOCH* = Epoch(0) # compute_epoch_at_slot(GENESIS_SLOT)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/fork-choice.md#constant
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/fork-choice.md#constant
   INTERVALS_PER_SLOT* = 3
 
   FAR_FUTURE_BEACON_TIME* = BeaconTime(ns_since_genesis: int64.high())
@@ -139,16 +139,16 @@ const
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/validator.md#broadcast-aggregate
   aggregateSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64  * 2 div INTERVALS_PER_SLOT)
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#prepare-sync-committee-message
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#prepare-sync-committee-message
   syncCommitteeMessageSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64  div INTERVALS_PER_SLOT)
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#broadcast-sync-committee-contribution
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#broadcast-sync-committee-contribution
   syncContributionSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64  * 2 div INTERVALS_PER_SLOT)
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/p2p-interface.md#sync-committee
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/light-client/p2p-interface.md#sync-committee
   lightClientFinalityUpdateSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64 div INTERVALS_PER_SLOT)
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/p2p-interface.md#sync-committee
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/light-client/p2p-interface.md#sync-committee
   lightClientOptimisticUpdateSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64 div INTERVALS_PER_SLOT)
 
@@ -188,7 +188,7 @@ func epoch*(slot: Slot): Epoch = # aka compute_epoch_at_slot
   if slot == FAR_FUTURE_SLOT: FAR_FUTURE_EPOCH
   else: Epoch(slot div SLOTS_PER_EPOCH)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/fork-choice.md#compute_slots_since_epoch_start
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/fork-choice.md#compute_slots_since_epoch_start
 func since_epoch_start*(slot: Slot): uint64 = # aka compute_slots_since_epoch_start
   ## How many slots since the beginning of the epoch (`[0..SLOTS_PER_EPOCH-1]`)
   (slot mod SLOTS_PER_EPOCH)
@@ -196,7 +196,7 @@ func since_epoch_start*(slot: Slot): uint64 = # aka compute_slots_since_epoch_st
 template is_epoch*(slot: Slot): bool =
   slot.since_epoch_start == 0
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#compute_start_slot_at_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#compute_start_slot_at_epoch
 func start_slot*(epoch: Epoch): Slot = # aka compute_start_slot_at_epoch
   ## Return the start slot of ``epoch``.
   const maxEpoch = Epoch(FAR_FUTURE_SLOT div SLOTS_PER_EPOCH)
@@ -216,7 +216,7 @@ iterator slots*(epoch: Epoch): Slot =
   for slot in start_slot ..< start_slot + SLOTS_PER_EPOCH:
     yield slot
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#sync-committee
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#sync-committee
 template sync_committee_period*(epoch: Epoch): SyncCommitteePeriod =
   if epoch == FAR_FUTURE_EPOCH: FAR_FUTURE_PERIOD
   else: SyncCommitteePeriod(epoch div EPOCHS_PER_SYNC_COMMITTEE_PERIOD)
diff --git a/beacon_chain/spec/beaconstate.nim b/beacon_chain/spec/beaconstate.nim
index 70e8499750..8f3ec0345e 100644
--- a/beacon_chain/spec/beaconstate.nim
+++ b/beacon_chain/spec/beaconstate.nim
@@ -86,7 +86,7 @@ func compute_activation_exit_epoch*(epoch: Epoch): Epoch =
   ## ``epoch`` take effect.
   epoch + 1 + MAX_SEED_LOOKAHEAD
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_validator_churn_limit
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#get_validator_churn_limit
 func get_validator_churn_limit*(
       cfg: RuntimeConfig, state: ForkyBeaconState, cache: var StateCache):
     uint64 =
@@ -301,7 +301,7 @@ from ./datatypes/deneb import BeaconState
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/beacon-chain.md#slash_validator
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#modified-slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#modified-slash_validator
 # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.0/specs/electra/beacon-chain.md#updated-slash_validator
 func get_slashing_penalty*(
     state: ForkyBeaconState, validator_effective_balance: Gwei): Gwei =
@@ -319,7 +319,7 @@ func get_slashing_penalty*(
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slash_validator
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#modified-slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#modified-slash_validator
 func get_whistleblower_reward*(
     state: phase0.BeaconState | altair.BeaconState | bellatrix.BeaconState |
            capella.BeaconState | deneb.BeaconState,
@@ -333,7 +333,7 @@ func get_whistleblower_reward*(
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/beacon-chain.md#slash_validator
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#modified-slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#modified-slash_validator
 func get_proposer_reward(state: ForkyBeaconState, whistleblower_reward: Gwei): Gwei =
   when state is phase0.BeaconState:
     whistleblower_reward div PROPOSER_REWARD_QUOTIENT
@@ -346,7 +346,7 @@ func get_proposer_reward(state: ForkyBeaconState, whistleblower_reward: Gwei): G
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slash_validator
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#modified-slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#modified-slash_validator
 proc slash_validator*(
     cfg: RuntimeConfig, state: var ForkyBeaconState,
     slashed_index: ValidatorIndex, pre_exit_queue_info: ExitQueueInfo,
@@ -419,7 +419,7 @@ func get_initial_beacon_block*(state: altair.HashedBeaconState):
   altair.TrustedSignedBeaconBlock(
     message: message, root: hash_tree_root(message))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#testing
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#testing
 func get_initial_beacon_block*(state: bellatrix.HashedBeaconState):
     bellatrix.TrustedSignedBeaconBlock =
   # The genesis block is implicitly trusted
@@ -624,7 +624,7 @@ func get_attesting_indices*(
 
   toSeq(get_attesting_indices_iter(state, data, aggregation_bits, cache))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_attesting_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#get_attesting_indices
 func get_attesting_indices*(
     state: ForkyBeaconState, data: AttestationData,
     aggregation_bits: ElectraCommitteeValidatorsBits, committee_bits: auto,
@@ -770,7 +770,7 @@ func check_attestation_index(
     Result[CommitteeIndex, cstring] =
   check_attestation_index(data.index, committees_per_slot)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/beacon-chain.md#get_attestation_participation_flag_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/beacon-chain.md#get_attestation_participation_flag_indices
 func get_attestation_participation_flag_indices(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState,
     data: AttestationData, inclusion_delay: uint64): set[TimelyFlag] =
@@ -1580,7 +1580,7 @@ proc initialize_hashed_beacon_state_from_eth1*(
       cfg, eth1_block_hash, eth1_timestamp, deposits, flags))
   result.root = hash_tree_root(result.data)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#testing
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#testing
 # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/beacon-chain.md#testing
 # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/deneb/beacon-chain.md#testing
 proc initialize_beacon_state_from_eth1*(
@@ -1933,7 +1933,7 @@ func upgrade_to_capella*(cfg: RuntimeConfig, pre: bellatrix.BeaconState):
     # historical_summaries initialized to correct default automatically
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/deneb/fork.md#upgrading-the-state
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/deneb/fork.md#upgrading-the-state
 func upgrade_to_deneb*(cfg: RuntimeConfig, pre: capella.BeaconState):
     ref deneb.BeaconState =
   let
@@ -2018,7 +2018,7 @@ func upgrade_to_deneb*(cfg: RuntimeConfig, pre: capella.BeaconState):
     historical_summaries: pre.historical_summaries
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/electra/fork.md#upgrading-the-state
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/electra/fork.md#upgrading-the-state
 func upgrade_to_electra*(
     cfg: RuntimeConfig, pre: deneb.BeaconState, cache: var StateCache):
     ref electra.BeaconState =
diff --git a/beacon_chain/spec/datatypes/altair.nim b/beacon_chain/spec/datatypes/altair.nim
index 370933c12b..06aab523ce 100644
--- a/beacon_chain/spec/datatypes/altair.nim
+++ b/beacon_chain/spec/datatypes/altair.nim
@@ -51,7 +51,7 @@ const
   PARTICIPATION_FLAG_WEIGHTS*: array[TimelyFlag, uint64] =
     [uint64 TIMELY_SOURCE_WEIGHT, TIMELY_TARGET_WEIGHT, TIMELY_HEAD_WEIGHT]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#misc
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#misc
   TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE* = 16
   SYNC_COMMITTEE_SUBNET_COUNT* = 4
 
@@ -101,7 +101,7 @@ type
     pubkeys*: HashArray[Limit SYNC_COMMITTEE_SIZE, ValidatorPubKey]
     aggregate_pubkey*: ValidatorPubKey
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#synccommitteemessage
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#synccommitteemessage
   SyncCommitteeMessage* = object
     slot*: Slot
       ## Slot to which this contribution pertains
@@ -115,7 +115,7 @@ type
     signature*: ValidatorSig
       ## Signature by the validator over the block root of `slot`
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#synccommitteecontribution
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#synccommitteecontribution
   SyncCommitteeAggregationBits* =
     BitArray[SYNC_SUBCOMMITTEE_SIZE]
 
@@ -137,18 +137,18 @@ type
     signature*: ValidatorSig
       ## Signature by the validator(s) over the block root of `slot`
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#contributionandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#contributionandproof
   ContributionAndProof* = object
     aggregator_index*: uint64 # `ValidatorIndex` after validation
     contribution*: SyncCommitteeContribution
     selection_proof*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#signedcontributionandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#signedcontributionandproof
   SignedContributionAndProof* = object
     message*: ContributionAndProof
     signature*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#syncaggregatorselectiondata
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#syncaggregatorselectiondata
   SyncAggregatorSelectionData* = object
     slot*: Slot
     subcommittee_index*: uint64 # `SyncSubcommitteeIndex` after validation
diff --git a/beacon_chain/spec/datatypes/base.nim b/beacon_chain/spec/datatypes/base.nim
index 222e80f771..774bf4c549 100644
--- a/beacon_chain/spec/datatypes/base.nim
+++ b/beacon_chain/spec/datatypes/base.nim
@@ -326,7 +326,7 @@ type
     withdrawable_epoch*: Epoch
       ## When validator can withdraw funds
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#pendingattestation
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#pendingattestation
   PendingAttestation* = object
     aggregation_bits*: CommitteeValidatorsBits
     data*: AttestationData
@@ -335,7 +335,7 @@ type
 
     proposer_index*: uint64 # `ValidatorIndex` after validation
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#historicalbatch
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#historicalbatch
   HistoricalBatch* = object
     block_roots* : array[SLOTS_PER_HISTORICAL_ROOT, Eth2Digest]
     state_roots* : array[SLOTS_PER_HISTORICAL_ROOT, Eth2Digest]
@@ -371,7 +371,7 @@ type
     state_root*: Eth2Digest
     body_root*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#signingdata
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#signingdata
   SigningData* = object
     object_root*: Eth2Digest
     domain*: Eth2Domain
@@ -400,7 +400,7 @@ type
     sync_committees*: Table[SyncCommitteePeriod, SyncCommitteeCache]
 
   # This matches the mutable state of the Solidity deposit contract
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/solidity_deposit_contract/deposit_contract.sol
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/solidity_deposit_contract/deposit_contract.sol
   DepositContractState* = object
     branch*: array[DEPOSIT_CONTRACT_TREE_DEPTH, Eth2Digest]
     deposit_count*: array[32, byte] # Uint256
diff --git a/beacon_chain/spec/datatypes/bellatrix.nim b/beacon_chain/spec/datatypes/bellatrix.nim
index 8e10438537..b2a67371b6 100644
--- a/beacon_chain/spec/datatypes/bellatrix.nim
+++ b/beacon_chain/spec/datatypes/bellatrix.nim
@@ -35,7 +35,7 @@ const
   NEWPAYLOAD_TIMEOUT* = 8.seconds
 
 type
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#custom-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#custom-types
   Transaction* = List[byte, Limit MAX_BYTES_PER_TRANSACTION]
 
   ExecutionAddress* = object
@@ -44,7 +44,7 @@ type
   BloomLogs* = object
     data*: array[BYTES_PER_LOGS_BLOOM, byte]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#executionpayload
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#executionpayload
   ExecutionPayload* = object
     # Execution block header fields
     parent_hash*: Eth2Digest
@@ -72,7 +72,7 @@ type
     executionPayload*: ExecutionPayload
     blockValue*: Wei
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#executionpayloadheader
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#executionpayloadheader
   ExecutionPayloadHeader* = object
     # Execution block header fields
     parent_hash*: Eth2Digest
@@ -102,7 +102,7 @@ type
     parent_hash*: Eth2Digest
     total_difficulty*: Eth2Digest   # uint256
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#beaconstate
   BeaconState* = object
     # Versioning
     genesis_time*: uint64
@@ -227,7 +227,7 @@ type
     state_root*: Eth2Digest
     body*: TrustedBeaconBlockBody
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#beaconblockbody
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#beaconblockbody
   BeaconBlockBody* = object
     randao_reveal*: ValidatorSig
     eth1_data*: Eth1Data
diff --git a/beacon_chain/spec/datatypes/deneb.nim b/beacon_chain/spec/datatypes/deneb.nim
index d2b9ae24cb..df802d03db 100644
--- a/beacon_chain/spec/datatypes/deneb.nim
+++ b/beacon_chain/spec/datatypes/deneb.nim
@@ -76,7 +76,7 @@ type
     kzg_commitment*: KzgCommitment
     versioned_hash*: string  # TODO should be string; VersionedHash not distinct
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/deneb/p2p-interface.md#blobidentifier
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/deneb/p2p-interface.md#blobidentifier
   BlobIdentifier* = object
     block_root*: Eth2Digest
     index*: BlobIndex
@@ -466,7 +466,7 @@ type
     bls_to_execution_changes*: SignedBLSToExecutionChangeList
     blob_kzg_commitments*: KzgCommitments  # [New in Deneb]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#signedbeaconblock
   SignedBeaconBlock* = object
     message*: BeaconBlock
     signature*: ValidatorSig
@@ -626,7 +626,7 @@ func kzg_commitment_inclusion_proof_gindex*(
 
   BLOB_KZG_COMMITMENTS_FIRST_GINDEX + index
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/deneb/light-client/sync-protocol.md#modified-get_lc_execution_root
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/deneb/light-client/sync-protocol.md#modified-get_lc_execution_root
 func get_lc_execution_root*(
     header: LightClientHeader, cfg: RuntimeConfig): Eth2Digest =
   let epoch = header.beacon.slot.epoch
@@ -657,7 +657,7 @@ func get_lc_execution_root*(
 
   ZERO_HASH
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/deneb/light-client/sync-protocol.md#modified-is_valid_light_client_header
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/deneb/light-client/sync-protocol.md#modified-is_valid_light_client_header
 func is_valid_light_client_header*(
     header: LightClientHeader, cfg: RuntimeConfig): bool =
   let epoch = header.beacon.slot.epoch
diff --git a/beacon_chain/spec/datatypes/electra.nim b/beacon_chain/spec/datatypes/electra.nim
index baacd98c38..0e5fd92962 100644
--- a/beacon_chain/spec/datatypes/electra.nim
+++ b/beacon_chain/spec/datatypes/electra.nim
@@ -186,7 +186,7 @@ type
     source_pubkey*: ValidatorPubKey
     target_pubkey*: ValidatorPubKey
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/validator.md#aggregateandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/validator.md#aggregateandproof
   AggregateAndProof* = object
     aggregator_index*: uint64 # `ValidatorIndex` after validation
     aggregate*: Attestation
@@ -399,7 +399,7 @@ type
     data*: BeaconState
     root*: Eth2Digest # hash_tree_root(data)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#beaconblock
   BeaconBlock* = object
     ## For each slot, a proposer is chosen from the validator pool to propose
     ## a new block. Once the block as been proposed, it is transmitted to
diff --git a/beacon_chain/spec/helpers.nim b/beacon_chain/spec/helpers.nim
index decd15b09b..973fb31834 100644
--- a/beacon_chain/spec/helpers.nim
+++ b/beacon_chain/spec/helpers.nim
@@ -25,7 +25,7 @@ import
 export
   eth2_merkleization, forks, rlp, ssz_codec
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/weak-subjectivity.md#constants
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/weak-subjectivity.md#constants
 const ETH_TO_GWEI = 1_000_000_000.Gwei
 
 func toEther*(gwei: Gwei): Ether =
@@ -162,7 +162,7 @@ func compute_domain*(
   result[0..3] = domain_type.data
   result[4..31] = fork_data_root.data.toOpenArray(0, 27)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_domain
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#get_domain
 func get_domain*(
     fork: Fork,
     domain_type: DomainType,
@@ -387,7 +387,7 @@ func contextEpoch*(bootstrap: ForkyLightClientBootstrap): Epoch =
 func contextEpoch*(update: SomeForkyLightClientUpdate): Epoch =
   update.attested_header.beacon.slot.epoch
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#is_merge_transition_complete
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#is_merge_transition_complete
 func is_merge_transition_complete*(
     state: bellatrix.BeaconState | capella.BeaconState | deneb.BeaconState |
            electra.BeaconState): bool =
@@ -395,7 +395,7 @@ func is_merge_transition_complete*(
     default(typeof(state.latest_execution_payload_header))
   state.latest_execution_payload_header != defaultExecutionPayloadHeader
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/sync/optimistic.md#helpers
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/sync/optimistic.md#helpers
 func is_execution_block*(blck: SomeForkyBeaconBlock): bool =
   when typeof(blck).kind >= ConsensusFork.Bellatrix:
     const defaultExecutionPayload =
@@ -404,7 +404,7 @@ func is_execution_block*(blck: SomeForkyBeaconBlock): bool =
   else:
     false
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#is_merge_transition_block
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#is_merge_transition_block
 func is_merge_transition_block(
     state: bellatrix.BeaconState | capella.BeaconState | deneb.BeaconState |
            electra.BeaconState,
@@ -420,7 +420,7 @@ func is_merge_transition_block(
   not is_merge_transition_complete(state) and
     body.execution_payload != defaultExecutionPayload
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#is_execution_enabled
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#is_execution_enabled
 func is_execution_enabled*(
     state: bellatrix.BeaconState | capella.BeaconState | deneb.BeaconState |
            electra.BeaconState,
@@ -434,7 +434,7 @@ func is_execution_enabled*(
           electra.SigVerifiedBeaconBlockBody): bool =
   is_merge_transition_block(state, body) or is_merge_transition_complete(state)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#compute_timestamp_at_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#compute_timestamp_at_slot
 func compute_timestamp_at_slot*(state: ForkyBeaconState, slot: Slot): uint64 =
   # Note: This function is unsafe with respect to overflows and underflows.
   let slots_since_genesis = slot - GENESIS_SLOT
diff --git a/beacon_chain/spec/keystore.nim b/beacon_chain/spec/keystore.nim
index bd32f6871c..4cbe18d0fc 100644
--- a/beacon_chain/spec/keystore.nim
+++ b/beacon_chain/spec/keystore.nim
@@ -1380,13 +1380,13 @@ proc createWallet*(kdfKind: KdfKind,
     crypto: crypto,
     nextAccount: nextAccount.get(0))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/validator.md#bls_withdrawal_prefix
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/validator.md#bls_withdrawal_prefix
 func makeWithdrawalCredentials*(k: ValidatorPubKey): Eth2Digest =
   var bytes = eth2digest(k.toRaw())
   bytes.data[0] = BLS_WITHDRAWAL_PREFIX.uint8
   bytes
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/deposit-contract.md#withdrawal-credentials
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/deposit-contract.md#withdrawal-credentials
 func makeWithdrawalCredentials*(k: CookedPubKey): Eth2Digest =
   makeWithdrawalCredentials(k.toPubKey())
 
diff --git a/beacon_chain/spec/network.nim b/beacon_chain/spec/network.nim
index d36fe7112f..a2df6ae5ca 100644
--- a/beacon_chain/spec/network.nim
+++ b/beacon_chain/spec/network.nim
@@ -14,8 +14,8 @@ import
 export base
 
 const
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/p2p-interface.md#topics-and-messages
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/p2p-interface.md#topics-and-messages
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/p2p-interface.md#topics-and-messages
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/capella/p2p-interface.md#topics-and-messages
   topicBeaconBlocksSuffix* = "beacon_block/ssz_snappy"
   topicVoluntaryExitsSuffix* = "voluntary_exit/ssz_snappy"
   topicProposerSlashingsSuffix* = "proposer_slashing/ssz_snappy"
@@ -63,7 +63,7 @@ func getAttesterSlashingsTopic*(forkDigest: ForkDigest): string =
 func getAggregateAndProofsTopic*(forkDigest: ForkDigest): string =
   eth2Prefix(forkDigest) & topicAggregateAndProofsSuffix
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/p2p-interface.md#topics-and-messages
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/capella/p2p-interface.md#topics-and-messages
 func getBlsToExecutionChangeTopic*(forkDigest: ForkDigest): string =
   eth2Prefix(forkDigest) & topicBlsToExecutionChangeSuffix
 
@@ -197,7 +197,7 @@ func getTargetGossipState*(
   targetForks
 
 func nearSyncCommitteePeriod*(epoch: Epoch): Opt[uint64] =
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#sync-committee-subnet-stability
   if epoch.is_sync_committee_period():
     return Opt.some 0'u64
   let epochsBefore =
@@ -216,7 +216,7 @@ func getSyncSubnets*(
     if not nodeHasPubkey(pubkey):
       continue
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#broadcast-sync-committee-message
+    # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#broadcast-sync-committee-message
     # The first quarter of the pubkeys map to subnet 0, the second quarter to
     # subnet 1, the third quarter to subnet 2 and the final quarter to subnet
     # 3.
diff --git a/beacon_chain/spec/presets.nim b/beacon_chain/spec/presets.nim
index 6278acbab3..b159c03954 100644
--- a/beacon_chain/spec/presets.nim
+++ b/beacon_chain/spec/presets.nim
@@ -787,7 +787,7 @@ proc readRuntimeConfig*(
                      "MAX_REQUEST_BLOB_SIDECARS"
   checkCompatibility BLOB_SIDECAR_SUBNET_COUNT
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/fork-choice.md#configuration
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/fork-choice.md#configuration
   # Isn't being used as a preset in the usual way: at any time, there's one correct value
   checkCompatibility PROPOSER_SCORE_BOOST
   checkCompatibility REORG_HEAD_WEIGHT_THRESHOLD
diff --git a/beacon_chain/spec/presets/gnosis/electra_preset.nim b/beacon_chain/spec/presets/gnosis/electra_preset.nim
index 3719f8c745..648195f7d9 100644
--- a/beacon_chain/spec/presets/gnosis/electra_preset.nim
+++ b/beacon_chain/spec/presets/gnosis/electra_preset.nim
@@ -8,7 +8,7 @@
 {.push raises: [].}
 
 # Gnosis preset - Electra (Gnosis version not avilable yet; EF mainnet for now)
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/mainnet/electra.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/mainnet/electra.yaml
 const
   # Gwei values
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/mainnet/altair_preset.nim b/beacon_chain/spec/presets/mainnet/altair_preset.nim
index 104b6725c8..e3610c72d9 100644
--- a/beacon_chain/spec/presets/mainnet/altair_preset.nim
+++ b/beacon_chain/spec/presets/mainnet/altair_preset.nim
@@ -8,7 +8,7 @@
 {.push raises: [].}
 
 # Mainnet preset - Altair
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/mainnet/altair.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/mainnet/altair.yaml
 const
   # Updated penalty values
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/mainnet/bellatrix_preset.nim b/beacon_chain/spec/presets/mainnet/bellatrix_preset.nim
index 5acf0a1eb1..9ba85b547d 100644
--- a/beacon_chain/spec/presets/mainnet/bellatrix_preset.nim
+++ b/beacon_chain/spec/presets/mainnet/bellatrix_preset.nim
@@ -8,7 +8,7 @@
 {.push raises: [].}
 
 # Mainnet preset - Bellatrix
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/mainnet/bellatrix.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/mainnet/bellatrix.yaml
 const
   # Updated penalty values
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/mainnet/capella_preset.nim b/beacon_chain/spec/presets/mainnet/capella_preset.nim
index 593c0f8704..fbf6680389 100644
--- a/beacon_chain/spec/presets/mainnet/capella_preset.nim
+++ b/beacon_chain/spec/presets/mainnet/capella_preset.nim
@@ -8,7 +8,7 @@
 {.push raises: [].}
 
 # Mainnet preset - Capella
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/mainnet/capella.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/mainnet/capella.yaml
 const
   # Max operations per block
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/mainnet/electra_preset.nim b/beacon_chain/spec/presets/mainnet/electra_preset.nim
index 52c88c998a..6cbc023dcc 100644
--- a/beacon_chain/spec/presets/mainnet/electra_preset.nim
+++ b/beacon_chain/spec/presets/mainnet/electra_preset.nim
@@ -8,7 +8,7 @@
 {.push raises: [].}
 
 # Electra preset - Electra
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/mainnet/electra.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/mainnet/electra.yaml
 const
   # Gwei values
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/minimal/altair_preset.nim b/beacon_chain/spec/presets/minimal/altair_preset.nim
index 365a94d59b..4db6ecb44e 100644
--- a/beacon_chain/spec/presets/minimal/altair_preset.nim
+++ b/beacon_chain/spec/presets/minimal/altair_preset.nim
@@ -8,7 +8,7 @@
 {.push raises: [].}
 
 # Minimal preset - Altair
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/minimal/altair.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/minimal/altair.yaml
 const
   # Updated penalty values
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/minimal/bellatrix_preset.nim b/beacon_chain/spec/presets/minimal/bellatrix_preset.nim
index 631e3f85ce..dd21c96969 100644
--- a/beacon_chain/spec/presets/minimal/bellatrix_preset.nim
+++ b/beacon_chain/spec/presets/minimal/bellatrix_preset.nim
@@ -8,7 +8,7 @@
 {.push raises: [].}
 
 # Minimal preset - Bellatrix
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/minimal/bellatrix.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/minimal/bellatrix.yaml
 const
   # Updated penalty values
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/minimal/capella_preset.nim b/beacon_chain/spec/presets/minimal/capella_preset.nim
index 7851d1a87e..518647b6f8 100644
--- a/beacon_chain/spec/presets/minimal/capella_preset.nim
+++ b/beacon_chain/spec/presets/minimal/capella_preset.nim
@@ -8,7 +8,7 @@
 {.push raises: [].}
 
 # Minimal preset - Capella
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/presets/minimal/capella.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/presets/minimal/capella.yaml
 const
   # Max operations per block
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/signatures.nim b/beacon_chain/spec/signatures.nim
index f48e790afa..b3db224ce2 100644
--- a/beacon_chain/spec/signatures.nim
+++ b/beacon_chain/spec/signatures.nim
@@ -269,7 +269,7 @@ proc verify_voluntary_exit_signature*(
 
     blsVerify(pubkey, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#prepare-sync-committee-message
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#prepare-sync-committee-message
 func compute_sync_committee_message_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     slot: Slot, beacon_block_root: Eth2Digest): Eth2Digest =
@@ -304,7 +304,7 @@ proc verify_sync_committee_signature*(
 
   blsFastAggregateVerify(pubkeys, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#aggregation-selection
 func compute_sync_committee_selection_proof_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     slot: Slot, subcommittee_index: SyncSubcommitteeIndex): Eth2Digest =
@@ -335,7 +335,7 @@ proc verify_sync_committee_selection_proof*(
 
     blsVerify(pubkey, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#signature
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#signature
 func compute_contribution_and_proof_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     msg: ContributionAndProof): Eth2Digest =
@@ -353,7 +353,7 @@ proc get_contribution_and_proof_signature*(
 
   blsSign(privkey, signing_root.data)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#aggregation-selection
 func is_sync_committee_aggregator*(signature: ValidatorSig): bool =
   let
     signatureDigest = eth2digest(signature.blob)
diff --git a/beacon_chain/spec/signatures_batch.nim b/beacon_chain/spec/signatures_batch.nim
index 02c0564deb..654d6fd383 100644
--- a/beacon_chain/spec/signatures_batch.nim
+++ b/beacon_chain/spec/signatures_batch.nim
@@ -83,7 +83,7 @@ func aggregateAttesters(
     # Aggregation spec requires non-empty collection
     # - https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-04
     # Consensus specs require at least one attesting index in attestation
-    # - https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+    # - https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
     return err("aggregateAttesters: no attesting indices")
 
   let
diff --git a/beacon_chain/spec/state_transition.nim b/beacon_chain/spec/state_transition.nim
index ef922b96bc..e77648778b 100644
--- a/beacon_chain/spec/state_transition.nim
+++ b/beacon_chain/spec/state_transition.nim
@@ -365,7 +365,7 @@ func partialBeaconBlock*(
 ): auto =
   const consensusFork = typeof(state).kind
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/validator.md#preparing-for-a-beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/validator.md#preparing-for-a-beaconblock
   var res = consensusFork.BeaconBlock(
     slot: state.data.slot,
     proposer_index: proposer_index.uint64,
diff --git a/beacon_chain/spec/state_transition_block.nim b/beacon_chain/spec/state_transition_block.nim
index a4e695ca16..6433f79c27 100644
--- a/beacon_chain/spec/state_transition_block.nim
+++ b/beacon_chain/spec/state_transition_block.nim
@@ -10,7 +10,7 @@
 # State transition - block processing, as described in
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#block-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#block-processing
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#block-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#block-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/beacon-chain.md#block-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/deneb/beacon-chain.md#block-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.1/specs/electra/beacon-chain.md#block-processing
@@ -135,7 +135,7 @@ func is_slashable_validator(validator: Validator, epoch: Epoch): bool =
     (validator.activation_epoch <= epoch) and
     (epoch < validator.withdrawable_epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#proposer-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#proposer-slashings
 proc check_proposer_slashing*(
     state: ForkyBeaconState, proposer_slashing: SomeProposerSlashing,
     flags: UpdateFlags):
@@ -1138,7 +1138,7 @@ proc process_block*(
 
   ok(operations_rewards)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#block-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#block-processing
 # TODO workaround for https://github.com/nim-lang/Nim/issues/18095
 type SomeBellatrixBlock =
   bellatrix.BeaconBlock | bellatrix.SigVerifiedBeaconBlock | bellatrix.TrustedBeaconBlock
diff --git a/beacon_chain/spec/state_transition_epoch.nim b/beacon_chain/spec/state_transition_epoch.nim
index 645c2e8016..b4b5476294 100644
--- a/beacon_chain/spec/state_transition_epoch.nim
+++ b/beacon_chain/spec/state_transition_epoch.nim
@@ -10,7 +10,7 @@
 # State transition - epoch processing, as described in
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#epoch-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#epoch-processing
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#epoch-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#epoch-processing
 #
 # The entry point is `process_epoch`, which is at the bottom of this file.
@@ -535,7 +535,7 @@ func get_attestation_component_delta(
   else:
     RewardDelta(penalties: base_reward)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#components-of-attestation-deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#components-of-attestation-deltas
 func get_source_delta*(
     validator: RewardStatus,
     base_reward: Gwei,
@@ -694,14 +694,14 @@ func get_unslashed_participating_increment*(
     flag_index: TimelyFlag): uint64 =
   info.balances.previous_epoch[flag_index] div EFFECTIVE_BALANCE_INCREMENT.Gwei
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/beacon-chain.md#get_flag_index_deltas
 func get_active_increments*(
     info: altair.EpochInfo | bellatrix.BeaconState): uint64 =
   info.balances.current_epoch div EFFECTIVE_BALANCE_INCREMENT.Gwei
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#get_flag_index_deltas
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#modified-get_inactivity_penalty_deltas
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#modified-get_inactivity_penalty_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#modified-get_inactivity_penalty_deltas
 # Combines get_flag_index_deltas() and get_inactivity_penalty_deltas()
 template get_flag_and_inactivity_delta(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
@@ -999,7 +999,7 @@ func process_registry_updates*(
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#slashings
 func get_adjusted_total_slashing_balance*(
     state: ForkyBeaconState, total_balance: Gwei): Gwei =
   const multiplier =
@@ -1018,14 +1018,14 @@ func get_adjusted_total_slashing_balance*(
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#slashings
 func slashing_penalty_applies*(validator: Validator, epoch: Epoch): bool =
   validator.slashed and
   epoch + EPOCHS_PER_SLASHINGS_VECTOR div 2 == validator.withdrawable_epoch
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#slashings
 func get_slashing_penalty*(validator: Validator,
                           adjusted_total_slashing_balance,
                           total_balance: Gwei): Gwei =
@@ -1037,7 +1037,7 @@ func get_slashing_penalty*(validator: Validator,
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/bellatrix/beacon-chain.md#slashings
 func get_slashing(
     state: ForkyBeaconState, total_balance: Gwei, vidx: ValidatorIndex): Gwei =
   # For efficiency reasons, it doesn't make sense to have process_slashings use
@@ -1124,7 +1124,7 @@ func process_historical_roots_update*(state: var ForkyBeaconState) =
   if next_epoch mod (SLOTS_PER_HISTORICAL_ROOT div SLOTS_PER_EPOCH) == 0:
     # Equivalent to hash_tree_root(foo: HistoricalBatch), but without using
     # significant additional stack or heap.
-    # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#historicalbatch
+    # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#historicalbatch
     # In response to https://github.com/status-im/nimbus-eth2/issues/921
     if not state.historical_roots.add state.compute_historical_root():
       raiseAssert "no more room for historical roots, so long and thanks for the fish!"
@@ -1384,7 +1384,7 @@ func init*(
            deneb.BeaconState | electra.BeaconState): T =
   init(result, state)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/beacon-chain.md#epoch-processing
 proc process_epoch*(
     cfg: RuntimeConfig,
     state: var (altair.BeaconState | bellatrix.BeaconState),
diff --git a/beacon_chain/spec/validator.nim b/beacon_chain/spec/validator.nim
index cc04b33ce0..ea0902fd49 100644
--- a/beacon_chain/spec/validator.nim
+++ b/beacon_chain/spec/validator.nim
@@ -158,7 +158,7 @@ func get_shuffled_active_validator_indices*(
   withState(state):
     cache.get_shuffled_active_validator_indices(forkyState.data, epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_active_validator_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#get_active_validator_indices
 func count_active_validators*(state: ForkyBeaconState,
                               epoch: Epoch,
                               cache: var StateCache): uint64 =
@@ -394,7 +394,7 @@ func compute_proposer_index(state: ForkyBeaconState,
   ## Return from ``indices`` a random index sampled by effective balance.
   compute_proposer_index(state, indices, seed, shuffled_index)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_beacon_proposer_index
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#get_beacon_proposer_index
 func get_beacon_proposer_index*(
     state: ForkyBeaconState, cache: var StateCache, slot: Slot):
     Opt[ValidatorIndex] =
diff --git a/beacon_chain/spec/weak_subjectivity.nim b/beacon_chain/spec/weak_subjectivity.nim
index 2fe449015f..c05ceabf72 100644
--- a/beacon_chain/spec/weak_subjectivity.nim
+++ b/beacon_chain/spec/weak_subjectivity.nim
@@ -10,10 +10,10 @@
 import
   ./datatypes/base, ./beaconstate, ./forks, ./helpers
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/weak-subjectivity.md#configuration
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/weak-subjectivity.md#configuration
 const SAFETY_DECAY* = 10'u64
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/weak-subjectivity.md#compute_weak_subjectivity_period
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/weak-subjectivity.md#compute_weak_subjectivity_period
 func compute_weak_subjectivity_period(
     cfg: RuntimeConfig, state: ForkyBeaconState): uint64 =
   ## Returns the weak subjectivity period for the current ``state``.
@@ -49,7 +49,7 @@ func compute_weak_subjectivity_period(
 
   ws_period
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/weak-subjectivity.md#is_within_weak_subjectivity_period
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/weak-subjectivity.md#is_within_weak_subjectivity_period
 func is_within_weak_subjectivity_period*(cfg: RuntimeConfig, current_slot: Slot,
                                          ws_state: ForkedHashedBeaconState,
                                          ws_checkpoint: Checkpoint): bool =
diff --git a/beacon_chain/sync/light_client_manager.nim b/beacon_chain/sync/light_client_manager.nim
index f8b8bc5a41..350077afc2 100644
--- a/beacon_chain/sync/light_client_manager.nim
+++ b/beacon_chain/sync/light_client_manager.nim
@@ -328,7 +328,7 @@ template query[E](
 ): Future[bool].Raising([CancelledError]) =
   self.query(e, Nothing())
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/light-client.md#light-client-sync-process
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/light-client/light-client.md#light-client-sync-process
 proc loop(self: LightClientManager) {.async: (raises: [CancelledError]).} =
   var nextSyncTaskTime = self.getBeaconTime()
   while true:
diff --git a/beacon_chain/sync/light_client_protocol.nim b/beacon_chain/sync/light_client_protocol.nim
index 339313c005..fc5c326238 100644
--- a/beacon_chain/sync/light_client_protocol.nim
+++ b/beacon_chain/sync/light_client_protocol.nim
@@ -90,7 +90,7 @@ p2pProtocol LightClientSync(version = 1,
 
     debug "LC bootstrap request done", peer, blockRoot
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/p2p-interface.md#lightclientupdatesbyrange
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/light-client/p2p-interface.md#lightclientupdatesbyrange
   proc lightClientUpdatesByRange(
       peer: Peer,
       startPeriod: SyncCommitteePeriod,
@@ -134,7 +134,7 @@ p2pProtocol LightClientSync(version = 1,
 
     debug "LC updates by range request done", peer, startPeriod, count, found
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/p2p-interface.md#getlightclientfinalityupdate
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/light-client/p2p-interface.md#getlightclientfinalityupdate
   proc lightClientFinalityUpdate(
       peer: Peer,
       response: SingleChunkResponse[ForkedLightClientFinalityUpdate])
diff --git a/beacon_chain/trusted_node_sync.nim b/beacon_chain/trusted_node_sync.nim
index 42b57787ad..5744c3e390 100644
--- a/beacon_chain/trusted_node_sync.nim
+++ b/beacon_chain/trusted_node_sync.nim
@@ -171,7 +171,7 @@ proc doTrustedNodeSync*(
     let stateId =
       case syncTarget.kind
       of TrustedNodeSyncKind.TrustedBlockRoot:
-        # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/light-client.md#light-client-sync-process
+        # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/light-client/light-client.md#light-client-sync-process
         const lcDataFork = LightClientDataFork.high
         var bestViableCheckpoint: Opt[tuple[slot: Slot, state_root: Eth2Digest]]
         func trackBestViableCheckpoint(store: lcDataFork.LightClientStore) =
diff --git a/beacon_chain/validators/beacon_validators.nim b/beacon_chain/validators/beacon_validators.nim
index 5fe5dcf4bd..ee4b84a6c7 100644
--- a/beacon_chain/validators/beacon_validators.nim
+++ b/beacon_chain/validators/beacon_validators.nim
@@ -1966,8 +1966,8 @@ proc handleValidatorDuties*(node: BeaconNode, lastSlot, slot: Slot) {.async: (ra
 
   updateValidatorMetrics(node) # the important stuff is done, update the vanity numbers
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/validator.md#broadcast-aggregate
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#broadcast-sync-committee-contribution
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/validator.md#broadcast-aggregate
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#broadcast-sync-committee-contribution
   # Wait 2 / 3 of the slot time to allow messages to propagate, then collect
   # the result in aggregates
   static:
diff --git a/beacon_chain/validators/slashing_protection_v2.nim b/beacon_chain/validators/slashing_protection_v2.nim
index 96359db807..0e5c21ce54 100644
--- a/beacon_chain/validators/slashing_protection_v2.nim
+++ b/beacon_chain/validators/slashing_protection_v2.nim
@@ -36,7 +36,7 @@ export results
 # - https://notes.ethereum.org/@djrtwo/Bkn3zpwxB#Validator-responsibilities
 #
 # Phase 0 spec - Honest Validator - how to avoid slashing
-# - https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/validator.md#how-to-avoid-slashing
+# - https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/validator.md#how-to-avoid-slashing
 #
 # In-depth reading on slashing conditions
 #
diff --git a/beacon_chain/validators/validator_pool.nim b/beacon_chain/validators/validator_pool.nim
index 4e035efac1..35ea4e8b7f 100644
--- a/beacon_chain/validators/validator_pool.nim
+++ b/beacon_chain/validators/validator_pool.nim
@@ -776,7 +776,7 @@ proc getAggregateAndProofSignature*(v: AttachedValidator,
       fork, genesis_validators_root, aggregate_and_proof)
     await v.signData(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#prepare-sync-committee-message
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#prepare-sync-committee-message
 proc getSyncCommitteeMessage*(v: AttachedValidator,
                               fork: Fork,
                               genesis_validators_root: Eth2Digest,
@@ -807,7 +807,7 @@ proc getSyncCommitteeMessage*(v: AttachedValidator,
     )
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#aggregation-selection
 proc getSyncCommitteeSelectionProof*(v: AttachedValidator, fork: Fork,
                                      genesis_validators_root: Eth2Digest,
                                      slot: Slot,
@@ -827,7 +827,7 @@ proc getSyncCommitteeSelectionProof*(v: AttachedValidator, fork: Fork,
     )
     await v.signData(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#broadcast-sync-committee-contribution
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#broadcast-sync-committee-contribution
 proc getContributionAndProofSignature*(v: AttachedValidator, fork: Fork,
                                        genesis_validators_root: Eth2Digest,
                                        contribution_and_proof: ContributionAndProof
diff --git a/docs/attestation_flow.md b/docs/attestation_flow.md
index 9e48bceaf1..723bcde5a0 100644
--- a/docs/attestation_flow.md
+++ b/docs/attestation_flow.md
@@ -6,7 +6,7 @@ This is a WIP document to explain the attestation flows.
 
 It is important to distinguish attestation `validation` from attestation `verification`.
 - Attestation `validation` is defined in the P2P specs. Validated attestations can be forwarded on GossipSub.
-  - Aggregated: https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
+  - Aggregated: https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
   - Unaggregated: https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
 - Attestation `verification` is defined in the consensus specs. Verified attestations can affect fork choice and may be included in a block.
   - https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#attestations
diff --git a/docs/block_flow.md b/docs/block_flow.md
index 9c37f2154d..c7b57e5b7b 100644
--- a/docs/block_flow.md
+++ b/docs/block_flow.md
@@ -9,7 +9,7 @@ Important distinction:
   https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/p2p-interface.md#beacon_block.
   A validated block can be forwarded on gossipsub.
 - and we distinguish `verification` which is defined in consensus specs:
-  https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#block-processing
+  https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/beacon-chain.md#block-processing
   A block needs to be verified to enter fork choice, the DAG and the BeaconChainDB
 
 In particular in terms of costly checks validating a block only requires checking:
diff --git a/docs/the_nimbus_book/src/el-light-client.md b/docs/the_nimbus_book/src/el-light-client.md
index 2c896089d1..688135618a 100644
--- a/docs/the_nimbus_book/src/el-light-client.md
+++ b/docs/the_nimbus_book/src/el-light-client.md
@@ -104,7 +104,7 @@ The following sections explain how to do this for certain EL clients.
 ## Running the light client
 
 The light client starts syncing from a trusted block.
-This trusted block should be somewhat recent ([~1-2 weeks](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/weak-subjectivity.md)) and needs to be configured each time when starting the light client.
+This trusted block should be somewhat recent ([~1-2 weeks](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/weak-subjectivity.md)) and needs to be configured each time when starting the light client.
 
 ### 1. Obtaining a trusted block root
 
diff --git a/tests/consensus_spec/altair/test_fixture_light_client_sync_protocol.nim b/tests/consensus_spec/altair/test_fixture_light_client_sync_protocol.nim
index 0ca3389446..642d819ea0 100644
--- a/tests/consensus_spec/altair/test_fixture_light_client_sync_protocol.nim
+++ b/tests/consensus_spec/altair/test_fixture_light_client_sync_protocol.nim
@@ -23,7 +23,7 @@ import
   # Test utilities
   ../../testutil, ../../testblockutil
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/tests/core/pyspec/eth2spec/test/helpers/sync_committee.py#L27-L44
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/tests/core/pyspec/eth2spec/test/helpers/sync_committee.py#L27-L44
 proc compute_aggregate_sync_committee_signature(
     cfg: RuntimeConfig,
     forked: ForkedHashedBeaconState,