diff --git a/OpenAuth.App/ServiceApp/FlyTaskJob.cs b/OpenAuth.App/ServiceApp/FlyTaskJob.cs
index c7fcca9..ab9a846 100644
--- a/OpenAuth.App/ServiceApp/FlyTaskJob.cs
+++ b/OpenAuth.App/ServiceApp/FlyTaskJob.cs
@@ -21,7 +21,7 @@ public class FlyTaskJob : IJob
         var job = _openJobApp.Get(jobId);
         if (job == null) return Task.CompletedTask;
         var param = JsonConvert.DeserializeObject<dynamic>(job.JobCallParams);
-        var taskId = param.taskId;
+        var taskId = (string)param.taskId;
         _manageApp.ExecuteFlyTask(taskId);
         return Task.CompletedTask;
     }