diff --git a/model/reward/instructor/rank_datasets.py b/model/reward/instructor/rank_datasets.py
index 0d710124..bd53eb02 100644
--- a/model/reward/instructor/rank_datasets.py
+++ b/model/reward/instructor/rank_datasets.py
@@ -18,9 +18,8 @@
 
 
 """
-from typing import List, Dict
 from dataclasses import dataclass
-from typing import Optional, Union
+from typing import Dict, List, Optional, Union
 
 import numpy as np
 import torch