diff --git a/swh/web/settings/production.py b/swh/web/settings/production.py
--- a/swh/web/settings/production.py
+++ b/swh/web/settings/production.py
@@ -34,7 +34,7 @@
 SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
 
 # We're going through seven (or, in that case, 2) proxies thanks to Varnish
-REST_FRAMEWORK['NUM_PROXIES'] = 2
+REST_FRAMEWORK['NUM_PROXIES'] = 2  # type: ignore
 
 DATABASES = {
     'default': {