diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index 9bae559b..791960f9 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -8,7 +8,7 @@
  * The MIT License
  *
  * Copyright (c) 2009 Adam MacBeth
- * Copyright (c) 2010-2022 sta.blockhead
+ * Copyright (c) 2010-2025 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