diff --git a/passerelle_imio_extra_fees/models.py b/passerelle_imio_extra_fees/models.py
index 5e183cf..ad94254 100644
--- a/passerelle_imio_extra_fees/models.py
+++ b/passerelle_imio_extra_fees/models.py
@@ -1,3 +1,5 @@
+# -*- coding: utf-8 -*-
+#
 # passerelle-imio-extra-fees - compute basket extra fees
 # Copyright (C) 2017 Entr'ouvert
 #