diff --git a/test/images/busybox/Dockerfile_windows b/test/images/busybox/Dockerfile_windows
index 5b25e06c0e9..f3cccc4d40c 100644
--- a/test/images/busybox/Dockerfile_windows
+++ b/test/images/busybox/Dockerfile_windows
@@ -1,4 +1,4 @@
-# Copyright 2020 The Kubernetes Authors.
+# Copyright 2021 The Kubernetes Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.