diff --git a/requirements.txt b/requirements.txt
index 0249235d..6f75002c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -114,7 +114,7 @@
 # simpleaichat
 
 transformers
-langchain==0.2.1
+langchain==langchain==0.0.240
 nest_asyncio
 pegasusx
 google-generativeai