diff --git a/effcee/effcee.h b/effcee/effcee.h
index 3a8a7e1..034a8b8 100644
--- a/effcee/effcee.h
+++ b/effcee/effcee.h
@@ -1,4 +1,4 @@
-// Copyright 2017 The Effcee Authors.
+// Copyright 2017-2026 The Effcee Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.