diff --git a/fastapi/types.py b/fastapi/types.py
index 127a3c52b..890eb430e 100644
--- a/fastapi/types.py
+++ b/fastapi/types.py
@@ -1,6 +1,17 @@
 import types
 from enum import Enum
-from typing import Any, Callable, Dict, Generic, Optional, Set, Tuple, Type, TypeVar, Union
+from typing import (
+    Any,
+    Callable,
+    Dict,
+    Generic,
+    Optional,
+    Set,
+    Tuple,
+    Type,
+    TypeVar,
+    Union,
+)
 
 from pydantic import BaseModel