diff --git a/grandlyon_cartads_cs/models.py b/grandlyon_cartads_cs/models.py
index a25971f..cb32c10 100644
--- a/grandlyon_cartads_cs/models.py
+++ b/grandlyon_cartads_cs/models.py
@@ -26,6 +26,7 @@ from django.utils.translation import ugettext_lazy as _
 
 from passerelle.apps.cartads_cs.models import AbstractCartaDSCS, CartaDSDossier
 from passerelle.utils import SOAPTransport
+from passerelle.utils.http_authenticators import HttpBearerAuth
 
 class Transport(SOAPTransport):
     def post(self, address, message, headers):