diff --git a/Makefile b/Makefile
index 48edeca..398c078 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-# Copyright (c) 2013-2019 by Michael Dvorkin. All Rights Reserved.
+# Copyright (c) 2013-2019 by Michael Dvorkin and contributors. All Rights Reserved.
 # Use of this source code is governed by a MIT-style license that can
 # be found in the LICENSE file.