diff --git a/grandlyon_cartads_cs/models.py b/grandlyon_cartads_cs/models.py
index cb32c10..b74ecf8 100644
--- a/grandlyon_cartads_cs/models.py
+++ b/grandlyon_cartads_cs/models.py
@@ -107,26 +107,27 @@ class GLCartaDSCS(AbstractCartaDSCS):
                 self.client_name,
                 datetime.datetime.now() - datetime.timedelta(days=1),
                 datetime.datetime.now()),
-        for cartads_dossier in resp[0]:
-            resp = client2.service.GetInfosDossier(self.get_token(), cartads_dossier['IdDossier'])
-            id_dossier_externe = resp['IdDossierExterne']
-            if not id_dossier_externe:
-                continue
-            if not id_dossier_externe.startswith('publik-'):
-                continue
-            publik, dossier_id, tracking_code = id_dossier_externe.split('-', 2)
-            try:
-                dossier = CartaDSDossier.objects.get(
-                    zip_ready=True,
-                    zip_sent=True,
-                    zip_ack_response='True',
-                    cartads_id_dossier__isnull=True,
-                    tracking_code=tracking_code,
-                    id=dossier_id)
-            except CartaDSDossier.DoesNotExist:
-                continue
-            dossier.cartads_id_dossier = resp['IdDossier']
-            dossier.cartads_numero_dossier = resp['NomDossier']
-            dossier.save()
+        if resp and resp[0] is not None:
+            for cartads_dossier in resp[0]:
+                resp = client2.service.GetInfosDossier(self.get_token(), cartads_dossier['IdDossier'])
+                id_dossier_externe = resp['IdDossierExterne']
+                if not id_dossier_externe:
+                    continue
+                if not id_dossier_externe.startswith('publik-'):
+                    continue
+                publik, dossier_id, tracking_code = id_dossier_externe.split('-', 2)
+                try:
+                    dossier = CartaDSDossier.objects.get(
+                        zip_ready=True,
+                        zip_sent=True,
+                        zip_ack_response='True',
+                        cartads_id_dossier__isnull=True,
+                        tracking_code=tracking_code,
+                        id=dossier_id)
+                except CartaDSDossier.DoesNotExist:
+                    continue
+                dossier.cartads_id_dossier = resp['IdDossier']
+                dossier.cartads_numero_dossier = resp['NomDossier']
+                dossier.save()
 
         super(GLCartaDSCS, self).hourly()