diff --git a/bitpack_.h b/bitpack_.h
index 3765752..aa262c2 100644
--- a/bitpack_.h
+++ b/bitpack_.h
@@ -1,6 +1,6 @@
 /**
   Copyright (C) powturbo 2013-2023
-  GPL v2 License
+  SPDX-License-Identifier: GPL v2 License
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by