diff --git a/comps/retrievers/opensearch/langchain/requirements.txt b/comps/retrievers/opensearch/langchain/requirements.txt
index 7fb987ccb..5690118bb 100644
--- a/comps/retrievers/opensearch/langchain/requirements.txt
+++ b/comps/retrievers/opensearch/langchain/requirements.txt
@@ -3,14 +3,14 @@ easyocr
 fastapi
 langchain_community
 langchain_huggingface
+numpy
 opensearch-py
 opentelemetry-api
 opentelemetry-exporter-otlp
 opentelemetry-sdk
 prometheus-fastapi-instrumentator
+pydantic
 pymupdf
 sentence_transformers
 shortuuid
 uvicorn
-pydantic
-numpy
diff --git a/comps/retrievers/opensearch/langchain/retriever_opensearch.py b/comps/retrievers/opensearch/langchain/retriever_opensearch.py
index f5b260230..c570cb6db 100644
--- a/comps/retrievers/opensearch/langchain/retriever_opensearch.py
+++ b/comps/retrievers/opensearch/langchain/retriever_opensearch.py
@@ -3,9 +3,9 @@
 
 import os
 import time
-import numpy as np
-from typing import Union, List, Callable
+from typing import Callable, List, Union
 
+import numpy as np
 from langchain_community.embeddings import HuggingFaceBgeEmbeddings
 from langchain_community.vectorstores import OpenSearchVectorSearch
 from langchain_huggingface import HuggingFaceEndpointEmbeddings
@@ -37,11 +37,8 @@
 
 
 async def search_all_embeddings_vectors(
-    embeddings: Union[conlist(float, min_length=0), List[conlist(float, min_length=0)]],
-    func: Callable,
-    *args,
-    **kwargs
-    ):
+    embeddings: Union[conlist(float, min_length=0), List[conlist(float, min_length=0)]], func: Callable, *args, **kwargs
+):
     try:
         if not isinstance(embeddings, np.ndarray):
             embeddings = np.array(embeddings)