diff --git a/pyproject.toml b/pyproject.toml
index 1a125530..9753484e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ dependencies = [
     "grpcio==1.83.0",
     "grpcio-status==1.83.0",
     "proto-plus==1.27.2",
-    "protobuf==6.33.5",
+    "protobuf==7.36.0",
     "googleapis-common-protos==1.75.1",
     # LangGraph / LangChain / LangSmith
     "langgraph>=0.2",