diff --git a/ANNOTATE/web/app.py b/ANNOTATE/web/app.py
index 547fdc0..13c4e34 100644
--- a/ANNOTATE/web/app.py
+++ b/ANNOTATE/web/app.py
@@ -17,6 +17,7 @@ from flask import Flask, render_template, request, jsonify, send_file
 from dash import Dash, html
 import logging
 from datetime import datetime
+from typing import Optional, Dict, List, Any
 import json
 import pandas as pd
 import numpy as np