diff --git a/python/examples/pipeline/grpc-gateway/proxy_server.go b/python/examples/pipeline/grpc-gateway/proxy_server.go
index efebf6c5bcd026605f8651216d3754e598114091..6c483ef8a5b572ba72d559d401d764cdf3dc41c1 100644
--- a/python/examples/pipeline/grpc-gateway/proxy_server.go
+++ b/python/examples/pipeline/grpc-gateway/proxy_server.go
@@ -1,3 +1,17 @@
+// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package main
 
 import (