diff --git a/api/services/audio_service.py b/api/services/audio_service.py
index bda2000851..382f97e7b3 100644
--- a/api/services/audio_service.py
+++ b/api/services/audio_service.py
@@ -3,16 +3,19 @@ import logging
 import uuid
 from typing import Optional
 
+from werkzeug.datastructures import FileStorage
+
 from constants import AUDIO_EXTENSIONS
 from core.model_manager import ModelManager
 from core.model_runtime.entities.model_entities import ModelType
 from models.model import App, AppMode, AppModelConfig, Message
-from services.errors.audio import (AudioTooLargeServiceError,
-                                   NoAudioUploadedServiceError,
-                                   ProviderNotSupportSpeechToTextServiceError,
-                                   ProviderNotSupportTextToSpeechServiceError,
-                                   UnsupportedAudioTypeServiceError)
-from werkzeug.datastructures import FileStorage
+from services.errors.audio import (
+    AudioTooLargeServiceError,
+    NoAudioUploadedServiceError,
+    ProviderNotSupportSpeechToTextServiceError,
+    ProviderNotSupportTextToSpeechServiceError,
+    UnsupportedAudioTypeServiceError,
+)
 
 FILE_SIZE = 30
 FILE_SIZE_LIMIT = FILE_SIZE * 1024 * 1024
@@ -76,9 +79,10 @@ class AudioService:
     ):
         from collections.abc import Generator
 
+        from flask import Response, stream_with_context
+
         from app import app
         from extensions.ext_database import db
-        from flask import Response, stream_with_context
 
         def invoke_tts(text_content: str, app_model: App, voice: Optional[str] = None):
             with app.app_context():