diff --git a/websocket-sharp/Net/ResponseStream.cs b/websocket-sharp/Net/ResponseStream.cs
index 0ca42c8c..c91b6e29 100644
--- a/websocket-sharp/Net/ResponseStream.cs
+++ b/websocket-sharp/Net/ResponseStream.cs
@@ -8,7 +8,7 @@
  * The MIT License
  *
  * Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
- * Copyright (c) 2012-2015 sta.blockhead
+ * Copyright (c) 2012-2020 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