diff --git a/doc/contribute.html b/doc/contribute.html
index abb2b9bf77..551d510288 100644
--- a/doc/contribute.html
+++ b/doc/contribute.html
@@ -925,13 +925,13 @@ New files that you contribute should use the standard copyright header:
 </p>
 
 <pre>
-// Copyright 2019 The Go Authors. All rights reserved.
+// Copyright 2020 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 </pre>
 
 <p>
-(Use the current year if you're reading this in 2020 or beyond.)
+(Use the current year if you're reading this in 2021 or beyond.)
 Files in the repository are copyrighted the year they are added.
 Do not update the copyright year on files that you change.
 </p>