diff --git a/mastodon/types_base.py b/mastodon/types_base.py
index 42f8172..b88630a 100644
--- a/mastodon/types_base.py
+++ b/mastodon/types_base.py
@@ -1,3 +1,4 @@
+from __future__ import annotations # pythong < 3.9 compat
 from typing import List, Union, Optional, Dict, Any, Tuple, Callable, get_type_hints, TypeVar, IO, Generic
 from datetime import datetime, timezone
 import dateutil