diff --git a/app/config/config.py b/app/config/config.py
index cf3e80a..5f21660 100644
--- a/app/config/config.py
+++ b/app/config/config.py
@@ -20,7 +20,7 @@ class Settings(BaseSettings):
     MYSQL_USER: str
     MYSQL_PASSWORD: str
     MYSQL_DATABASE: str
-    MYSQL_SOCKET: str = None
+    MYSQL_SOCKET: str = ""
     
     # API相关配置
     API_KEYS: List[str]