diff --git a/src/ansys/dpf/composites/_typing_helper.py b/src/ansys/dpf/composites/_typing_helper.py
index 9ac0b5c5a..3ac338fc2 100644
--- a/src/ansys/dpf/composites/_typing_helper.py
+++ b/src/ansys/dpf/composites/_typing_helper.py
@@ -4,4 +4,4 @@
 
 __all__ = ["PATH"]
 
-PATH = Union[str, os.PathLike]
+PATH = Union[str, os.PathLike[str]]