diff --git a/conf/config.json b/conf/config.json
index bbe9eed..a316b24 100644
--- a/conf/config.json
+++ b/conf/config.json
@@ -15,6 +15,7 @@
     "localstorage.allowsymlinks": true,
     "simpleSignUpLink.shown": false,
     "default_phone_region": "",
+    "maintenance_window_start": 1,
     "mail_smtpmode": "smtp",
     "mail_smtpport": "25",
     "mail_smtpauth": 1,