diff --git a/pyproject.toml b/pyproject.toml
index 3277227..3d51834 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,7 +56,7 @@ dependencies = [
   "scikit-learn-extra==0.3.0",
   "pydantic>=2.0.0",
   "optree==0.17.0",
-  "protobuf==6.31.1",
+  "protobuf==6.33.5",
   "numpy==2.4.1",
   "networkx>=3.4.2",
   "requests>=2.31.0",