diff --git a/api/apps/__init__.py b/api/apps/__init__.py
index 5e0796f3f..63de1fbf3 100644
--- a/api/apps/__init__.py
+++ b/api/apps/__init__.py
@@ -28,7 +28,6 @@ from api.db.services import UserService
 from api.utils.json_encode import CustomJSONEncoder
 from api.utils import commands
 
-from flask_mail import Mail
 from quart_auth import Unauthorized
 from common import settings
 from api.utils.api_utils import server_error_response
diff --git a/api/apps/tenant_app.py b/api/apps/tenant_app.py
index ae456fb79..be6305e89 100644
--- a/api/apps/tenant_app.py
+++ b/api/apps/tenant_app.py
@@ -82,7 +82,6 @@ async def create(tenant_id):
         status=StatusEnum.VALID.value)
 
     try:
-        from threading import Thread
 
         user_name = ""
         _, user = UserService.get_by_id(current_user.id)
diff --git a/api/apps/user_app.py b/api/apps/user_app.py
index 9285a6f5b..2e653052c 100644
--- a/api/apps/user_app.py
+++ b/api/apps/user_app.py
@@ -22,7 +22,7 @@ import secrets
 import time
 from datetime import datetime
 
-from quart import redirect, request, session, make_response
+from quart import redirect, request, session
 from werkzeug.security import check_password_hash, generate_password_hash
 
 from api.apps.auth import get_auth_client
diff --git a/api/utils/web_utils.py b/api/utils/web_utils.py
index 8a6cf2edc..cba87535f 100644
--- a/api/utils/web_utils.py
+++ b/api/utils/web_utils.py
@@ -21,10 +21,8 @@ import re
 import socket
 from urllib.parse import urlparse
 import aiosmtplib
-from api.apps import app
 from email.mime.text import MIMEText
 from email.header import Header
-from flask_mail import Message
 from common import settings
 from quart import render_template_string
 from api.utils.email_templates import EMAIL_TEMPLATES
diff --git a/common/data_source/box_connector.py b/common/data_source/box_connector.py
index e5aeb7614..0eab3ec08 100644
--- a/common/data_source/box_connector.py
+++ b/common/data_source/box_connector.py
@@ -1,5 +1,4 @@
 """Box connector"""
-import os
 import logging
 from datetime import datetime, timezone
 from typing import Any
diff --git a/rag/svr/sync_data_source.py b/rag/svr/sync_data_source.py
index cfa94aa85..87165f0d5 100644
--- a/rag/svr/sync_data_source.py
+++ b/rag/svr/sync_data_source.py
@@ -33,7 +33,6 @@ from datetime import datetime, timezone
 from typing import Any
 
 from flask import json
-import trio
 
 from api.db.services.connector_service import ConnectorService, SyncLogsService
 from api.db.services.knowledgebase_service import KnowledgebaseService