diff --git a/End_to_end_Solutions/AOAISearchDemo/app/requirements.txt b/End_to_end_Solutions/AOAISearchDemo/app/requirements.txt
index 56e7decd..737a99a1 100644
--- a/End_to_end_Solutions/AOAISearchDemo/app/requirements.txt
+++ b/End_to_end_Solutions/AOAISearchDemo/app/requirements.txt
@@ -1,6 +1,6 @@
 azure-identity==1.13.0b3
 Flask==2.2.2
-langchain==0.0.139
+langchain==0.0.236
 openai==0.27.4
 azure-search-documents==11.4.0b3
 azure-storage-blob==12.14.1