diff --git a/swh/web/settings/common.py b/swh/web/settings/common.py
--- a/swh/web/settings/common.py
+++ b/swh/web/settings/common.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2017-2019  The Software Heritage developers
+# Copyright (C) 2017-2020  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU Affero General Public License version 3, or any later version
 # See top-level LICENSE file for more information
@@ -11,6 +11,8 @@
 import os
 import sys
 
+from typing import Any, Dict
+
 from swh.web.config import get_config
 
 swh_web_config = get_config()
@@ -159,7 +161,7 @@
             throttle_rates[limiter_scope + '_' + http_request.lower()] = \
                 limiter_conf['limiter_rate'][http_request]
 
-REST_FRAMEWORK = {
+REST_FRAMEWORK: Dict[str, Any] = {
     'DEFAULT_RENDERER_CLASSES': (
         'rest_framework.renderers.JSONRenderer',
         'swh.web.api.renderers.YAMLRenderer',