diff --git a/async_timeout/__init__.py b/async_timeout/__init__.py
index 1ffb069..4649d24 100644
--- a/async_timeout/__init__.py
+++ b/async_timeout/__init__.py
@@ -6,10 +6,7 @@
 from typing import Optional, Type
 
 
-if sys.version_info >= (3, 8):
-    from typing import final
-else:
-    from typing_extensions import final
+from typing import final
 
 
 if sys.version_info >= (3, 11):