diff --git a/chatdev/chat_chain.py b/chatdev/chat_chain.py
index cc451e9..d66094b 100644
--- a/chatdev/chat_chain.py
+++ b/chatdev/chat_chain.py
@@ -52,7 +52,6 @@ class ChatChain:
         with open(self.config_phase_path, 'r', encoding="utf8") as file:
             self.config_phase = json.load(file)
         with open(self.config_role_path, 'r', encoding="utf8") as file:
-
             self.config_role = json.load(file)
 
         # init chatchain config and recruitments