diff --git a/pyproject.toml b/pyproject.toml
index 5579cb1c..5f4c0ce7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ polkadot = ["substrate-interface==1.3.4"]
 cosmos = ["cosmospy==6.0.0"]
 solana = ["pynacl==1.5.0", "base58==2.1.1"]
 tezos = ["pynacl==1.5.0", "aleph-pytezos==3.13.4"]
-docs = ["sphinxcontrib-plantuml==0.27"]
+docs = ["sphinxcontrib-plantuml==0.30"]
 
 [project.urls]
 Documentation = "https://docs.aleph.im/tools/aleph-client/"
@@ -81,7 +81,7 @@ dependencies = [
   "types-requests==2.32.0.20240602",
   "types-setuptools==70.0.0.20240524",
   "typing_extensions==4.12.2",
-  "sphinxcontrib-plantuml==0.27"
+  "sphinxcontrib-plantuml==0.30"
 ]
 
 [tool.hatch.envs.testing]