diff --git a/archivebox/core/settings.py b/archivebox/core/settings.py
index 11fd649d..5b44898b 100644
--- a/archivebox/core/settings.py
+++ b/archivebox/core/settings.py
@@ -124,6 +124,7 @@ if LDAP:
         }
 
         AUTHENTICATION_BACKENDS = [
+            'django.contrib.auth.backends.ModelBackend',
             'django_auth_ldap.backend.LDAPBackend',
         ]
     except ModuleNotFoundError: