diff --git a/examples/helloworld/greeter_client_python/requirements.txt b/examples/helloworld/greeter_client_python/requirements.txt
index f44223b..c3b442b 100644
--- a/examples/helloworld/greeter_client_python/requirements.txt
+++ b/examples/helloworld/greeter_client_python/requirements.txt
@@ -1,2 +1,2 @@
 grpcio==1.32.0
-protobuf==3.15.0
+protobuf==3.18.3