[copyright] added Contributors
diff --git a/utilities/cleanup_data.py b/utilities/cleanup_data.py
index fe83ade8..630a54e 100644
--- a/utilities/cleanup_data.py
+++ b/utilities/cleanup_data.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd.
+# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
 # License: GNU General Public License v3. See license.txt
 
 #!/usr/bin/python