type error

app.py

@@ -1,4 +1,5 @@
 import streamlit as st
+from typing import List
 import textract
 import tempfile
 import spacy
@@ -30,7 +31,7 @@ def download_model(language:str, select_model:str):
         except Exception as e:
             return False
 
-def search_docs(query:str, documents:list[Doc], nlp) -> list[Span]:
+def search_docs(query:str, documents:List[Doc], nlp) -> List[Span]:
     terms = query.split('|')
     patterns = [nlp.make_doc(text) for text in terms]
     matcher = PhraseMatcher(nlp.vocab)