diff --git a/lambda/aws-rag-appsync-stepfn-opensearch/s3_file_transformer/src/requirements.txt b/lambda/aws-rag-appsync-stepfn-opensearch/s3_file_transformer/src/requirements.txt
index 539bce9a..aff6a91e 100644
--- a/lambda/aws-rag-appsync-stepfn-opensearch/s3_file_transformer/src/requirements.txt
+++ b/lambda/aws-rag-appsync-stepfn-opensearch/s3_file_transformer/src/requirements.txt
@@ -4,5 +4,5 @@ fastjsonschema
 typing-extensions
 boto3
 requests
-langchain==0.0.317
+langchain==0.0.325
 pypdf2