diff --git a/COPYRIGHT.txt b/COPYRIGHT.txt
index 48cea364..66b401ac 100644
--- a/COPYRIGHT.txt
+++ b/COPYRIGHT.txt
@@ -1,4 +1,4 @@
-All code in this repository is Copyright 2018 by Angus McLeod.
+All code in this repository is Copyright 2023 by Angus McLeod.
 
 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