diff --git a/bundles/infobeamer-cms/metadata.py b/bundles/infobeamer-cms/metadata.py
index 5ac0c46..8d8703b 100644
--- a/bundles/infobeamer-cms/metadata.py
+++ b/bundles/infobeamer-cms/metadata.py
@@ -30,8 +30,7 @@ def nginx(metadata):
                             'target': 'http://127.0.0.1:8000',
                         },
                         '/sync': {
-                            'return': 'forbidden',
-                            'mode': 403,
+                            'return': 403,
                         },
                         '/static': {
                             'alias': '/opt/infobeamer-cms/src/static',