diff --git a/api_server/utils/file_operations.py b/api_server/utils/file_operations.py
index b82411ae8..ef1bf999e 100644
--- a/api_server/utils/file_operations.py
+++ b/api_server/utils/file_operations.py
@@ -1,6 +1,6 @@
 import os
-from typing import List, Union, TypedDict, Literal, TypeGuard
-
+from typing import List, Union, TypedDict, Literal
+from typing_extensions import TypeGuard
 class FileInfo(TypedDict):
     name: str
     path: str