diff --git a/libs/core/langchain_core/callbacks/manager.py b/libs/core/langchain_core/callbacks/manager.py
index 9bde40c14aa..86502fa954c 100644
--- a/libs/core/langchain_core/callbacks/manager.py
+++ b/libs/core/langchain_core/callbacks/manager.py
@@ -11,15 +11,7 @@ from abc import ABC, abstractmethod
 from concurrent.futures import ThreadPoolExecutor
 from contextlib import asynccontextmanager, contextmanager
 from contextvars import copy_context
-from typing import (
-    TYPE_CHECKING,
-    Any,
-    Callable,
-    Optional,
-    TypeVar,
-    Union,
-    cast,
-)
+from typing import TYPE_CHECKING, Any, Callable, Optional, TypeVar, Union, cast
 from uuid import UUID
 
 from langsmith.run_helpers import get_tracing_context