diff --git a/multi-route-chain-app/multi_route_chain_app/rag_stack_custom_resources/requirements.txt b/multi-route-chain-app/multi_route_chain_app/rag_stack_custom_resources/requirements.txt
index e7f46bd..9b58c6f 100644
--- a/multi-route-chain-app/multi_route_chain_app/rag_stack_custom_resources/requirements.txt
+++ b/multi-route-chain-app/multi_route_chain_app/rag_stack_custom_resources/requirements.txt
@@ -1,4 +1,4 @@
-langchain==0.0.334
+langchain==0.1.11
 opensearch-py==2.3.2
 requests-aws4auth==1.2.3
 boto3==1.28.84