diff --git a/uniborg/storage.py b/uniborg/storage.py
index d19f773..b6d39ee 100644
--- a/uniborg/storage.py
+++ b/uniborg/storage.py
@@ -1,3 +1,6 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
 import os
 import json