diff --git a/stubs/pydu/request.pyi b/stubs/pydu/request.pyi
index 7f06369..8ec8505 100644
--- a/stubs/pydu/request.pyi
+++ b/stubs/pydu/request.pyi
@@ -10,4 +10,4 @@ class FileName(object):
     def from_any(cls, dst: str=None, headers: Headers=None, url: str=None) -> Optional[str]: ...
 
 def download(url: str, dst: str=None) -> str: ...
-def check_connect(ip: str, port: int, retry: int, timout: float) -> Optional[str]: ...
+def check_connect(ip: str, port: int, retry: int=1, timout: float=0.5) -> Optional[str]: ...