diff --git a/qlib/workflow/task/manage.py b/qlib/workflow/task/manage.py
index dd42caf65..7a85036da 100644
--- a/qlib/workflow/task/manage.py
+++ b/qlib/workflow/task/manage.py
@@ -24,9 +24,7 @@ from bson.binary import Binary
 from bson.objectid import ObjectId
 from pymongo.errors import InvalidDocument
 from qlib import auto_init, get_module_logger
-import qlib
 from tqdm.cli import tqdm
-import yaml
 
 from .utils import get_mongodb