diff --git a/LICENSE b/LICENSE
index 391f88ae..b9bcc573 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,7 @@
 BSD 3-Clause License
 
 Copyright (c) 2016-2023 The excelize Authors.
+Copyright (c) 2011-2017 Geoffrey J. Teale
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without