diff --git a/demohouse/ad_video_gen/backend/app/release-agent/src/release_agent/tools/video_combine_vod.py b/demohouse/ad_video_gen/backend/app/release-agent/src/release_agent/tools/video_combine_vod.py
index 6586ad28..5a3f7d54 100644
--- a/demohouse/ad_video_gen/backend/app/release-agent/src/release_agent/tools/video_combine_vod.py
+++ b/demohouse/ad_video_gen/backend/app/release-agent/src/release_agent/tools/video_combine_vod.py
@@ -1,3 +1,14 @@
+# Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
+# Licensed under the 【火山方舟】原型应用软件自用许可协议
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at 
+#     https://www.volcengine.com/docs/82379/1433703
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 import asyncio
 import json
 import os
diff --git a/demohouse/deep_search_mcp/backend/requirements.txt b/demohouse/deep_search_mcp/backend/requirements.txt
index b8dfce23..63d89d7e 100644
--- a/demohouse/deep_search_mcp/backend/requirements.txt
+++ b/demohouse/deep_search_mcp/backend/requirements.txt
@@ -49,7 +49,7 @@ jsonpatch==1.33
 jsonpointer==3.0.0
 keyring==25.6.0
 langchain==0.3.23
-langchain-core==0.3.51
+langchain-core>=0.3.81
 langchain-text-splitters==0.3.8
 langsmith==0.3.30
 markdown-it-py==3.0.0