diff --git a/manifest.json b/manifest.json
index d5e6c75..a92a2a0 100644
--- a/manifest.json
+++ b/manifest.json
@@ -50,7 +50,7 @@
                     "en": "Install CardDAV synchronization plugin?",
                     "fr": "Installer le plugin de synchronisation CardDAV ?"
                 },
-                "default": false
+                "default": "false"
             }
         ]
     }