diff --git a/flake.lock b/flake.lock
index 09648dbd..1eba9567 100644
--- a/flake.lock
+++ b/flake.lock
@@ -848,6 +848,23 @@
         "type": "github"
       }
     },
+    "ibc-go-v7-indexer-subs-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1726659959,
+        "narHash": "sha256-I54u/UnvkSSVcj/73qyboW2irijthWxw2Xvd0bntHMk=",
+        "owner": "informalsystems",
+        "repo": "ibc-go",
+        "rev": "7ca60663a1d7d15f1c659746191a4a8d41879fa2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "informalsystems",
+        "ref": "cometbft/indexer-subs-cap-1",
+        "repo": "ibc-go",
+        "type": "github"
+      }
+    },
     "ibc-go-v7-src": {
       "flake": false,
       "locked": {
@@ -1463,6 +1480,7 @@
         "ibc-go-v4-src": "ibc-go-v4-src",
         "ibc-go-v5-src": "ibc-go-v5-src",
         "ibc-go-v6-src": "ibc-go-v6-src",
+        "ibc-go-v7-indexer-subs-src": "ibc-go-v7-indexer-subs-src",
         "ibc-go-v7-src": "ibc-go-v7-src",
         "ibc-go-v7-wasm-src": "ibc-go-v7-wasm-src",
         "ibc-go-v8-src": "ibc-go-v8-src",
diff --git a/flake.nix b/flake.nix
index b4fa00bd..78579644 100644
--- a/flake.nix
+++ b/flake.nix
@@ -150,6 +150,14 @@
     ibc-go-v9-src.url = "github:cosmos/ibc-go/v9.0.0-beta.1";
     ibc-go-v9-src.flake = false;
 
+    ibc-go-v7-indexer-subs-src = {
+      type = "github";
+      owner = "informalsystems";
+      repo = "ibc-go";
+      ref = "cometbft/indexer-subs-cap-1";
+      flake = false;
+    };
+
     ibc-go-v7-wasm-src = {
       type = "github";
       owner = "cosmos";
diff --git a/modules/apps.nix b/modules/apps.nix
index 3e960d0b..857b77e2 100644
--- a/modules/apps.nix
+++ b/modules/apps.nix
@@ -130,6 +130,10 @@
             type = "app";
             program = "${packages.ibc-go-v9-simapp}/bin/simd";
           };
+          ibc-go-v7-simapp-indexer-subs = {
+            type = "app";
+            program = "${packages.ibc-go-v7-simapp-indexer-subs}/bin/simd";
+          };
           ibc-go-v7-wasm-simapp = {
             type = "app";
             program = "${packages.ibc-go-v7-wasm-simapp}/bin/simd";
diff --git a/packages/ibc-go.nix b/packages/ibc-go.nix
index f78d4fb3..974a459a 100644
--- a/packages/ibc-go.nix
+++ b/packages/ibc-go.nix
@@ -104,6 +104,18 @@ with inputs;
       buildInputs = [libwasmvm_2_1_0];
     };
 
+    ibc-go-v7-indexer-subs-simapp = {
+      name = "simd";
+      version = "v7.8.0-index-subs";
+      src = ibc-go-v7-indexer-subs-src;
+      rev = ibc-go-v7-indexer-subs-src.rev;
+      vendorHash = "sha256-EghDcmVUBT7AeXdTAsWkM+BdPFKhTBGzmjEmQxzW+R8=";
+      tags = ["netgo"];
+      engine = "cometbft/cometbft";
+      excludedPackages = ["./e2e" "./modules/apps/callbacks"];
+      doCheck = false;
+    };
+
     ibc-go-v7-wasm-simapp = {
       name = "simd";
       version = "v7.4.0-wasm";