diff --git a/vsmasktools/edge/_abstract.py b/vsmasktools/edge/_abstract.py
index 1c76d80..0329df2 100644
--- a/vsmasktools/edge/_abstract.py
+++ b/vsmasktools/edge/_abstract.py
@@ -5,7 +5,10 @@ from enum import Enum, IntFlag, auto
 from typing import Any, ClassVar, NoReturn, Sequence, TypeAlias, TypeVar, cast
 
 from jetpytools import CustomNotImplementedError, inject_kwargs_params
-from typing_extensions import TypeIs
+try:
+    from typing_extensions import TypeIs
+except:
+    from typing import TypeIs
 
 from vsexprtools import ExprOp, ExprToken, norm_expr
 from vstools import (