diff --git a/hello-grpc-python/requirements.txt b/hello-grpc-python/requirements.txt
index ac34720..b30dbcd 100644
--- a/hello-grpc-python/requirements.txt
+++ b/hello-grpc-python/requirements.txt
@@ -3,8 +3,8 @@
 # grpcio-tools==1.69.0
 grpcio-tools==1.69.0
 # https://pypi.org/project/protobuf/
-# protobuf==5.29.2
-protobuf==5.29.2
+# protobuf==5.29.3
+protobuf==5.29.3
 # https://pypi.org/project/futures/
 # https://pypi.org/project/futures3/
 futures==3.0.5