diff --git a/LogicApps-AI-RAG-Demo/TokenizeDocFunction/requirements.txt b/LogicApps-AI-RAG-Demo/TokenizeDocFunction/requirements.txt
index 1387373..9cc66a7 100644
--- a/LogicApps-AI-RAG-Demo/TokenizeDocFunction/requirements.txt
+++ b/LogicApps-AI-RAG-Demo/TokenizeDocFunction/requirements.txt
@@ -3,6 +3,6 @@
 # Manually managing azure-functions-worker may cause unexpected issues
 
 azure-functions
-langchain==0.0.326
+langchain==1.3.9
 tiktoken==0.5.1
 pypdf==3.15.5