diff --git a/attachment_minio/models/ir_attachment.py b/attachment_minio/models/ir_attachment.py
index 08122566..7a50ad16 100644
--- a/attachment_minio/models/ir_attachment.py
+++ b/attachment_minio/models/ir_attachment.py
@@ -1,3 +1,7 @@
+# Copyright 2020 Hibou Corp.
+# Copyright 2016 Camptocamp SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)
+
 import io
 import base64
 import logging