diff --git a/accounting/transport.py b/accounting/transport.py
index d3970843bd17506bb59a3034f4d4ad63db1f1c1e..2e4a494ad554664058bcdf6d03e98a9e3ee09a16 100644
--- a/accounting/transport.py
+++ b/accounting/transport.py
@@ -1,3 +1,7 @@
+# Part of accounting-api project:
+# https://gitorious.org/conservancy/accounting-api
+# License: AGPLv3-or-later
+
 from datetime import datetime
 
 from flask import json