diff --git a/src/utils/config/service-helpers.js b/src/utils/config/service-helpers.js
index 2a76a8349..9d55ce43a 100644
--- a/src/utils/config/service-helpers.js
+++ b/src/utils/config/service-helpers.js
@@ -637,7 +637,7 @@ export function cleanServiceGroups(groups) {
           if (vehicleID !== undefined) cleanedService.widget.vehicleID = parseInt(vehicleID, 10);
         }
         if (type === "vikunja") {
-          if (enableTaskList !== undefined) cleanedService.widget.enableTaskList = enableTaskList;
+          if (enableTaskList !== undefined) cleanedService.widget.enableTaskList = !!enableTaskList;
         }
       }