diff --git a/util/http.py b/util/http.py
index b607fc01b..bb43bd7f8 100644
--- a/util/http.py
+++ b/util/http.py
@@ -1,7 +1,8 @@
 import logging
 
-from flask import request, abort as flask_abort
+from flask import request, abort as flask_abort, make_response
 from auth.auth import process_auth, extract_namespace_repo_from_session, get_authenticated_user, get_validated_token
+from werkzeug.exceptions import HTTPException
 
 logger = logging.getLogger(__name__)