diff --git a/requirements.txt b/requirements.txt
index c433a1bb..6cd022a6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # transformers
 # openai
-# langchain==0.0.240
+# langchain==0.0.263
 
 # torch
 # torchvision
@@ -114,7 +114,7 @@
 # simpleaichat
 
 transformers
-langchain==0.0.240
+langchain==0.0.263
 nest_asyncio
 pegasusx
 google-generativeai 
diff --git a/setup.py b/setup.py
index 7ba403d6..e23b835f 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@ setup(
   install_requires=[
         'transformers',
         'openai',
-        'langchain==0.0.240',
+        'langchain==0.0.263',
         # 'torch',
         # 'torchvision',
         # 'torchaudio',