diff --git a/django-stubs/views/static.pyi b/django-stubs/views/static.pyi
index 9c9e04a..5839f66 100644
--- a/django-stubs/views/static.pyi
+++ b/django-stubs/views/static.pyi
@@ -3,7 +3,7 @@ from typing import Any, Optional
 from django.http.request import HttpRequest
 from django.http.response import FileResponse
 
-def serve(request: HttpRequest, path: str, document_root: str = ..., show_indexes: bool = ...) -> FileResponse: ...
+def serve(request: HttpRequest, path: str, document_root: Optional[str] = ..., show_indexes: bool = ...) -> FileResponse: ...
 
 DEFAULT_DIRECTORY_INDEX_TEMPLATE: str
 template_translatable: Any