diff --git a/libs/langchain/langchain/memory/summary.py b/libs/langchain/langchain/memory/summary.py
index bbbe4293dcd..0c07ac6f754 100644
--- a/libs/langchain/langchain/memory/summary.py
+++ b/libs/langchain/langchain/memory/summary.py
@@ -3,8 +3,8 @@ from __future__ import annotations
 from typing import Any, Dict, List, Type
 
 from langchain_core._api import deprecated
-from langchain_core.caches import BaseCache as BaseCache # For model_rebuild
-from langchain_core.callbacks import Callbacks as Callbacks # For model_rebuild
+from langchain_core.caches import BaseCache as BaseCache  # For model_rebuild
+from langchain_core.callbacks import Callbacks as Callbacks  # For model_rebuild
 from langchain_core.chat_history import BaseChatMessageHistory
 from langchain_core.language_models import BaseLanguageModel
 from langchain_core.messages import BaseMessage, SystemMessage, get_buffer_string