diff --git a/app/notify_client/service_api_client.py b/app/notify_client/service_api_client.py
index 22074e3a3..59929079b 100644
--- a/app/notify_client/service_api_client.py
+++ b/app/notify_client/service_api_client.py
@@ -61,9 +61,8 @@ class ServiceAPIClient(NotifyAdminAPIClient):
             start_date = datetime.now(timezone.utc).strftime("%Y-%m-%d")
 
         return self.get(
-            "/service/{0}/statistics/user/{1}/{2}/{3}?timezone={4}".format(
-            service_id, user_id, start_date, days, user_timezone
-        ))["data"]
+            "/service/{0}/statistics/user/{1}/{2}/{3}?timezone={4}".format(service_id, user_id, start_date, days, user_timezone),
+        )["data"]
 
     def get_services(self, params_dict=None):
         """