diff --git a/hello-grpc-python/requirements.txt b/hello-grpc-python/requirements.txt
index 2d9ccf8..a21ed7e 100644
--- a/hello-grpc-python/requirements.txt
+++ b/hello-grpc-python/requirements.txt
@@ -1,7 +1,7 @@
 # https://pypi.org/project/grpcio-tools/
 grpcio-tools==1.64.0
 # https://pypi.org/project/protobuf/
-protobuf==5.27.0
+protobuf==5.27.1
 # https://pypi.org/project/futures/
 # https://pypi.org/project/futures3/
 futures==3.0.5