diff --git a/routers/swagger.py b/routers/swagger.py
index c58e147..924dee3 100644
--- a/routers/swagger.py
+++ b/routers/swagger.py
@@ -7,6 +7,11 @@ from config import conf
 
 from auth import verify_user_pwd
 
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from fastapi.security import HTTPBasicCredentials
+
 router = APIRouter()