diff --git a/LICENSE.txt b/LICENSE.txt
index abcd2a4..aa72f83 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2020 Geoff Boeing https://geoffboeing.com/
+Copyright (c) 2015-2021 Geoff Boeing https://geoffboeing.com/
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal