diff --git a/lambda/s3_file_transformer/src/requirements.txt b/lambda/s3_file_transformer/src/requirements.txt
index 73ad4045..b9cca733 100644
--- a/lambda/s3_file_transformer/src/requirements.txt
+++ b/lambda/s3_file_transformer/src/requirements.txt
@@ -4,5 +4,5 @@ fastjsonschema
 typing-extensions
 boto3
 requests
-langchain==0.0.246
+langchain==0.0.308
 pypdf2