diff --git a/websocket-sharp/Ext.cs b/websocket-sharp/Ext.cs
index a55151d0..04026d78 100644
--- a/websocket-sharp/Ext.cs
+++ b/websocket-sharp/Ext.cs
@@ -14,7 +14,7 @@
  * Copyright (c) 2003 Ben Maurer
  * Copyright (c) 2003, 2005, 2009 Novell, Inc. (http://www.novell.com)
  * Copyright (c) 2009 Stephane Delcroix
- * Copyright (c) 2010-2016 sta.blockhead
+ * Copyright (c) 2010-2022 sta.blockhead
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal