diff --git a/wintun.proj b/wintun.proj
index 3715f93..7335980 100644
--- a/wintun.proj
+++ b/wintun.proj
@@ -2,7 +2,7 @@
 <!--
   SPDX-License-Identifier: GPL-2.0
 
-  Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+  Copyright (C) 2018-2021 WireGuard LLC. All Rights Reserved.
 -->
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="Build">
   <PropertyGroup>
diff --git a/wintun.props b/wintun.props
index f4f6a76..866b18e 100644
--- a/wintun.props
+++ b/wintun.props
@@ -2,7 +2,7 @@
 <!--
   SPDX-License-Identifier: GPL-2.0
 
-  Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+  Copyright (C) 2018-2021 WireGuard LLC. All Rights Reserved.
 -->
 <Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">