diff --git a/apps/language_models/langchain/langchain_requirements.txt b/apps/language_models/langchain/langchain_requirements.txt
index 6b5f9f02..7db5e53f 100644
--- a/apps/language_models/langchain/langchain_requirements.txt
+++ b/apps/language_models/langchain/langchain_requirements.txt
@@ -65,7 +65,7 @@ tiktoken==0.4.0
 openai==0.27.8
 
 # optional for chat with PDF
-langchain==0.0.325
+langchain==0.0.329
 pypdf==3.17.0
 # avoid textract, requires old six
 #textract==1.6.5