diff --git a/plugins/connectrpc/python/v0.4.2/requirements.txt b/plugins/connectrpc/python/v0.4.2/requirements.txt
index 50ec3f13f..adb957685 100644
--- a/plugins/connectrpc/python/v0.4.2/requirements.txt
+++ b/plugins/connectrpc/python/v0.4.2/requirements.txt
@@ -7,7 +7,7 @@ frozenlist==1.7.0
 idna==3.10
 multidict==6.6.3
 propcache==0.3.2
-protobuf==6.31.1
+protobuf==6.33.5
 protogen==0.3.1
 typing_extensions==4.14.1
 urllib3==2.5.0