diff --git a/pandora/websocket/worker.py b/pandora/websocket/worker.py
index 1a0e633d..9a3d7bd4 100644
--- a/pandora/websocket/worker.py
+++ b/pandora/websocket/worker.py
@@ -24,7 +24,7 @@ class Worker(ConsumerMixin):
 
     def process_task(self, body, message):
         try:
-            if body['task'] == 'trigger_event':
+            if isinstance(body, dict) and body.get('task') == 'trigger_event':
                 daemon.trigger_event(*body['args'])
         except:
             logger.error('faild to trigger event %s', body, exc_info=True)