diff --git a/.travis/ASF-Release.cfg b/.travis/ASF-Release.cfg
index 2c415ce729de..3beefe1bd0c4 100644
--- a/.travis/ASF-Release.cfg
+++ b/.travis/ASF-Release.cfg
@@ -83,6 +83,7 @@ NOTICE.txt
 build-cache
 deps
 test-nginx
+grpc_server_example
 .travis.yml
 
 conf
diff --git a/doc/plugins/redirect-cn.md b/doc/plugins/redirect-cn.md
index 4262da254e3d..5edaaf8bb378 100644
--- a/doc/plugins/redirect-cn.md
+++ b/doc/plugins/redirect-cn.md
@@ -1,3 +1,22 @@
+<!--
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
+-->
+
 [English](redirect.md)
 
 # redirect
diff --git a/doc/plugins/redirect.md b/doc/plugins/redirect.md
index 7b3f734eb693..d38aafa5acbb 100644
--- a/doc/plugins/redirect.md
+++ b/doc/plugins/redirect.md
@@ -1,3 +1,22 @@
+<!--
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
+-->
+
 [中文](redirect-cn.md)
 
 # redirect
diff --git a/lua/apisix/plugins/redirect.lua b/lua/apisix/plugins/redirect.lua
index 89eec65804e1..733a8483220b 100644
--- a/lua/apisix/plugins/redirect.lua
+++ b/lua/apisix/plugins/redirect.lua
@@ -1,3 +1,19 @@
+--
+-- Licensed to the Apache Software Foundation (ASF) under one or more
+-- contributor license agreements.  See the NOTICE file distributed with
+-- this work for additional information regarding copyright ownership.
+-- The ASF licenses this file to You 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.
+--
 local core = require("apisix.core")
 local tab_insert = table.insert
 local tab_concat = table.concat
diff --git a/t/plugin/redirect.t b/t/plugin/redirect.t
index 6edd21582df3..0f413c521812 100644
--- a/t/plugin/redirect.t
+++ b/t/plugin/redirect.t
@@ -1,3 +1,19 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
 BEGIN {
     if ($ENV{TEST_NGINX_CHECK_LEAK}) {
         $SkipReason = "unavailable for the hup tests";