diff --git a/backend/helpers.py b/backend/helpers.py
index 68ac7cb33..b7f9fba4d 100644
--- a/backend/helpers.py
+++ b/backend/helpers.py
@@ -2,6 +2,7 @@
 import ssl
 import uuid
 
+from aiohttp.web import middleware, Response
 from subprocess import check_output
 from time import sleep