diff --git a/services/unstructured/main.py b/services/unstructured/main.py
index c856a603b..e1040dbd5 100644
--- a/services/unstructured/main.py
+++ b/services/unstructured/main.py
@@ -4,7 +4,7 @@
 import logging
 import os
 from io import BytesIO
-from typing import Dict, List
+from typing import Dict, List, Optional
 
 from fastapi import FastAPI, HTTPException
 from pydantic import BaseModel