diff --git a/Task/Task.php b/Task/Task.php
index 8da8d3d..1467b1d 100644
--- a/Task/Task.php
+++ b/Task/Task.php
@@ -72,19 +72,15 @@ class Task
      */
     public function onTask(Server $server, int $task_id, int $src_worker_id, mixed $data): void
     {
-        $response = 'task data format failed.';
         try {
-            $data = json_decode($data, true);
-            if (!is_null($data)) {
-                [$handler, $params] = [$data[0], $data[1]];
+            [$handler, $params] = [$data[0], $data[1]];
 
-                $handler = Kiri::getDi()->make($handler, $params);
-                if (!($handler instanceof OnTaskInterface)) {
-                    throw new \Exception('Task process must implements ' . OnTaskInterface::class);
-                }
-
-                $response = call_user_func([$handler, 'process'], $task_id, $src_worker_id);
+            $handler = Kiri::getDi()->make($handler, $params);
+            if (!($handler instanceof OnTaskInterface)) {
+                throw new \Exception('Task process must implements ' . OnTaskInterface::class);
             }
+
+            $response = call_user_func([$handler, 'process'], $task_id, $src_worker_id);
         } catch (\Throwable $throwable) {
             $response = throwable($throwable);
         } finally {