diff --git a/libs/partners/openai/langchain_openai/chat_models/base.py b/libs/partners/openai/langchain_openai/chat_models/base.py
index dd82f6fe744..785b2ce9c24 100644
--- a/libs/partners/openai/langchain_openai/chat_models/base.py
+++ b/libs/partners/openai/langchain_openai/chat_models/base.py
@@ -19,7 +19,8 @@ from operator import itemgetter
 from typing import (
     TYPE_CHECKING,
     Any,
-    Callable,    Literal,
+    Callable,
+    Literal,
     Optional,
     TypedDict,
     TypeVar,