diff --git a/COPYING.adoc b/COPYING.adoc
index a864e4af..4b4a3257 100644
--- a/COPYING.adoc
+++ b/COPYING.adoc
@@ -1,4 +1,4 @@
-Copyright © 2001-2022
+Copyright © 2001-2023
 Contributors to the Freedoom project.  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without