diff --git a/executor/window_test.go b/executor/window_test.go
index 4bda1bd23e2a0..b5a4ae647243a 100644
--- a/executor/window_test.go
+++ b/executor/window_test.go
@@ -1,4 +1,4 @@
-// Copyright 2018 PingCAP, Inc.
+// Copyright 2019 PingCAP, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.