diff --git a/RAG/src/chain_server/requirements.txt b/RAG/src/chain_server/requirements.txt
index 217b864ae..a0a31637e 100644
--- a/RAG/src/chain_server/requirements.txt
+++ b/RAG/src/chain_server/requirements.txt
@@ -1,7 +1,7 @@
 fastapi==0.110.0
 uvicorn[standard]==0.27.1
 python-multipart==0.0.9
-langchain==0.1.9
+langchain==0.3.30
 unstructured[all-docs]==0.12.5
 sentence-transformers==3.0.0
 llama-index-core==0.10.27