diff --git a/src/allmydata/web/common.py b/src/allmydata/web/common.py
index b55a49d4d..470170e7d 100644
--- a/src/allmydata/web/common.py
+++ b/src/allmydata/web/common.py
@@ -5,7 +5,8 @@ from __future__ import annotations
 
 from six import ensure_str
 
-from typing import Optional, Union, TypeVar, Literal, overload
+from typing import Optional, Union, TypeVar, overload
+from typing_extensions import Literal
 
 import time
 import json