diff --git a/python/xoscar/backends/communication/socket.py b/python/xoscar/backends/communication/socket.py
index 37ff103..c20e04c 100644
--- a/python/xoscar/backends/communication/socket.py
+++ b/python/xoscar/backends/communication/socket.py
@@ -204,9 +204,9 @@ def channel_type(self) -> int:
     @classmethod
     def parse_config(cls, config: dict) -> dict:
         # we only need the following config
-        keys_of_interest = ['listen_elastic_ip', 'address', 'host', 'port']
+        keys_of_interest = ["listen_elastic_ip", "address", "host", "port"]
         parsed_config = {key: config[key] for key in keys_of_interest if key in config}
-    
+
         return parsed_config
 
     @staticmethod