[copyright] added Contributors
diff --git a/stock/stock_ledger.py b/stock/stock_ledger.py
index 1555dab..469fa53 100644
--- a/stock/stock_ledger.py
+++ b/stock/stock_ledger.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
 
 import webnotes