diff --git a/libs/langchain/langchain/memory/chat_message_histories/dynamodb.py b/libs/langchain/langchain/memory/chat_message_histories/dynamodb.py
index 318afdce13a..353356ef5ba 100644
--- a/libs/langchain/langchain/memory/chat_message_histories/dynamodb.py
+++ b/libs/langchain/langchain/memory/chat_message_histories/dynamodb.py
@@ -53,7 +53,7 @@ class DynamoDBChatMessageHistory(BaseChatMessageHistory):
         kms_key_id: Optional[str] = None,
     ):
         if boto3_session:
-            client = boto3_session.resource("dynamodb")
+            client = boto3_session.resource("dynamodb", endpoint_url=endpoint_url)
         else:
             try:
                 import boto3