diff --git a/examples/python/grpc_api/requirements.txt b/examples/python/grpc_api/requirements.txt
old mode 100755
new mode 100644
index a850381..512115a
--- a/examples/python/grpc_api/requirements.txt
+++ b/examples/python/grpc_api/requirements.txt
@@ -1,4 +1,4 @@
 grpcio==1.37.0
-protobuf==3.17.2
+protobuf==3.18.3
 six==1.12.0
 grpcio-status == 1.29.0
\ No newline at end of file