diff --git a/paddlespeech/server/engine/asr/online/paddleinference/asr_engine.py b/paddlespeech/server/engine/asr/online/paddleinference/asr_engine.py
index b3b31a5a..a450e430 100644
--- a/paddlespeech/server/engine/asr/online/paddleinference/asr_engine.py
+++ b/paddlespeech/server/engine/asr/online/paddleinference/asr_engine.py
@@ -352,6 +352,7 @@ class PaddleASRConnectionHanddler:
     def rescoring(self):
         ...
 
+
 class ASRServerExecutor(ASRExecutor):
     def __init__(self):
         super().__init__()