diff --git a/zfs-backup.py b/zfs-backup.py
index ed63f23..568c827 100755
--- a/zfs-backup.py
+++ b/zfs-backup.py
@@ -9,7 +9,6 @@ from pathlib import Path
 from re import search
 from subprocess import PIPE, Popen, call, check_output
 from sys import exit
-from typing import Optional  # TODO replace with pipe notation
 from uuid import UUID
 
 import config
@@ -129,7 +128,7 @@ def _get_regex_matching_snapshots_with_tags(tags: list[str]):
 
 
 class ZFSPath:
-    def __init__(self, elements: list[str], snapname: Optional[str] = None):
+    def __init__(self, elements: list[str], snapname: str | None = None):
         self._elements = elements
         self._snapname = snapname
         self._is_snapshot = False