diff --git a/comps/cores/proto/docarray.py b/comps/cores/proto/docarray.py
index 6fd31b9099..af1b99d5b8 100644
--- a/comps/cores/proto/docarray.py
+++ b/comps/cores/proto/docarray.py
@@ -1,7 +1,7 @@
 # Copyright (C) 2024 Intel Corporation
 # SPDX-License-Identifier: Apache-2.0
 
-from typing import Dict, List, Optional, Union, Tuple
+from typing import Dict, List, Optional, Tuple, Union
 
 import numpy as np
 from docarray import BaseDoc, DocList
@@ -19,12 +19,15 @@ class TopologyInfo:
 class TextDoc(BaseDoc, TopologyInfo):
     text: str
 
+
 class ImageDoc(BaseDoc):
     image_path: str
-    
+
+
 class TextImageDoc(BaseDoc):
     doc: Tuple[Union[TextDoc, ImageDoc]]
 
+
 class Base64ByteStrDoc(BaseDoc):
     byte_str: str
 
@@ -71,6 +74,7 @@ class SearchedDoc(BaseDoc):
     class Config:
         json_encoders = {np.ndarray: lambda x: x.tolist()}
 
+
 class SearchedMultimodalDoc(BaseDoc):
     retrieved_docs: List[TextImageDoc]
     initial_query: str
@@ -80,6 +84,7 @@ class SearchedMultimodalDoc(BaseDoc):
     class Config:
         json_encoders = {np.ndarray: lambda x: x.tolist()}
 
+
 class GeneratedDoc(BaseDoc):
     text: str
     prompt: str
@@ -184,6 +189,7 @@ class LVMDoc(BaseDoc):
     repetition_penalty: float = 1.03
     streaming: bool = False
 
+
 class LVMVideoDoc(BaseDoc):
     video_url: str
     chunk_start: float
diff --git a/comps/reranks/video-rag-qna/README.md b/comps/reranks/video-rag-qna/README.md
index 2b458404ab..fc97faa841 100644
--- a/comps/reranks/video-rag-qna/README.md
+++ b/comps/reranks/video-rag-qna/README.md
@@ -22,11 +22,12 @@ done
 ```
 
 Available configuration by environment variable:
+
 - CHUNK_DURATION: target chunk duration, should be aligned with VideoRAGQnA dataprep. Default 10s.
 
 # ✅ 2. Test
 
-``` bash
+```bash
 export ip_address=$(hostname -I | awk '{print $1}')
 curl -X 'POST' \
 "http://${ip_address}:8000/v1/reranking" \
diff --git a/comps/reranks/video-rag-qna/local_reranking.py b/comps/reranks/video-rag-qna/local_reranking.py
index ee1fc9f105..5d7196f8d2 100644
--- a/comps/reranks/video-rag-qna/local_reranking.py
+++ b/comps/reranks/video-rag-qna/local_reranking.py
@@ -8,8 +8,8 @@
 from langsmith import traceable
 
 from comps import (
-    SearchedMultimodalDoc,
     LVMVideoDoc,
+    SearchedMultimodalDoc,
     ServiceType,
     opea_microservices,
     register_microservice,
@@ -23,10 +23,9 @@
 file_server_url = os.getenv("FILE_SERVER_URL") or "http://0.0.0.0:6005"
 
 logging.basicConfig(
-    level=logging.INFO,
-    format="%(levelname)s:     [%(asctime)s] %(message)s",
-    datefmt="%d/%m/%Y %I:%M:%S"
-    )
+    level=logging.INFO, format="%(levelname)s:     [%(asctime)s] %(message)s", datefmt="%d/%m/%Y %I:%M:%S"
+)
+
 
 def get_top_doc(top_n, videos) -> list:
     hit_score = {}
@@ -40,23 +39,21 @@ def get_top_doc(top_n, videos) -> list:
         except KeyError as r:
             logging.info(f"no video name {r}")
 
-    x = dict(sorted(hit_score.items(), key=lambda item: -item[1])) # sorted dict of video name and score
+    x = dict(sorted(hit_score.items(), key=lambda item: -item[1]))  # sorted dict of video name and score
     top_n_names = list(x.keys())[:top_n]
     logging.info(f"top docs = {x}")
     logging.info(f"top n docs names = {top_n_names}")
-    
+
     return top_n_names
 
+
 def find_timestamp_from_video(metadata_list, video):
     return next(
-        (
-            metadata['timestamp']
-            for metadata in metadata_list
-            if metadata['video'] == video
-        ),
+        (metadata["timestamp"] for metadata in metadata_list if metadata["video"] == video),
         None,
     )
 
+
 @register_microservice(
     name="opea_service@reranking_visual_rag",
     service_type=ServiceType.RERANK,
@@ -70,7 +67,7 @@ def find_timestamp_from_video(metadata_list, video):
 @register_statistics(names=["opea_service@reranking_visual_rag"])
 def reranking(input: SearchedMultimodalDoc) -> LVMVideoDoc:
     start = time.time()
-    
+
     # get top video name from metadata
     video_names = [meta["video"] for meta in input.metadata]
     top_video_names = get_top_doc(input.top_n, video_names)
@@ -78,10 +75,16 @@ def reranking(input: SearchedMultimodalDoc) -> LVMVideoDoc:
     # only use the first top video
     timestamp = find_timestamp_from_video(input.metadata, top_video_names[0])
     video_url = f"{file_server_url.rstrip('/')}/{top_video_names[0]}"
-    
-    result = LVMVideoDoc(video_url=video_url, prompt=input.initial_query, chunk_start=timestamp, chunk_duration=float(chunk_duration), max_new_tokens=512)
+
+    result = LVMVideoDoc(
+        video_url=video_url,
+        prompt=input.initial_query,
+        chunk_start=timestamp,
+        chunk_duration=float(chunk_duration),
+        max_new_tokens=512,
+    )
     statistics_dict["opea_service@reranking_visual_rag"].append_latency(time.time() - start, None)
-    
+
     return result
 
 
diff --git a/comps/reranks/video-rag-qna/requirements.txt b/comps/reranks/video-rag-qna/requirements.txt
index 01c09f72da..abc233971d 100644
--- a/comps/reranks/video-rag-qna/requirements.txt
+++ b/comps/reranks/video-rag-qna/requirements.txt
@@ -1,11 +1,11 @@
 datasets
 docarray
 fastapi
-uvicorn
+langsmith
 opentelemetry-api
 opentelemetry-exporter-otlp
 opentelemetry-sdk
 prometheus-fastapi-instrumentator
 pydub
 shortuuid
-langsmith
\ No newline at end of file
+uvicorn