import updated

cve_factchecker/retriever.py

@@ -5,7 +5,7 @@ import re
 import time
 from typing import List, Dict, Any, Tuple, Optional
 from langchain_text_splitters import RecursiveCharacterTextSplitter
-from langchain.schema import Document
+from langchain_core.documents import Document
 try:
     from langchain_chroma import Chroma  # type: ignore
 except Exception: