update copyright year
diff --git a/NOTICE b/NOTICE
index a1f5070..01f9ca9 100644
--- a/NOTICE
+++ b/NOTICE
@@ -1,5 +1,5 @@
 Apache log4cxx
-Copyright 2004-2022 The Apache Software Foundation
+Copyright 2004-2023 The Apache Software Foundation
 
 This product includes software developed by
 The Apache Software Foundation (http://www.apache.org/).