diff --git a/websocket-sharp/Net/NetworkCredential.cs b/websocket-sharp/Net/NetworkCredential.cs
index 357ade49..3ee52f40 100644
--- a/websocket-sharp/Net/NetworkCredential.cs
+++ b/websocket-sharp/Net/NetworkCredential.cs
@@ -4,7 +4,7 @@
  *
  * The MIT License
  *
- * Copyright (c) 2014-2015 sta.blockhead
+ * Copyright (c) 2014-2017 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