diff --git a/doc.go b/doc.go
index ddee7c9c..3b3f5e5e 100644
--- a/doc.go
+++ b/doc.go
@@ -1,6 +1,6 @@
 // The MIT License (MIT)
 
-// Copyright (c) 2014-2021 Philip O'Toole
+// Copyright (c) 2014-2023 Philip O'Toole
 
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal