diff --git a/qt/aqt/taskman.py b/qt/aqt/taskman.py
index a7b48ec35..2e22606ee 100644
--- a/qt/aqt/taskman.py
+++ b/qt/aqt/taskman.py
@@ -10,7 +10,7 @@ from __future__ import annotations
 from concurrent.futures import Future
 from concurrent.futures.thread import ThreadPoolExecutor
 from threading import Lock
-from typing import Any, Callable, Dict, List, Optional, Union
+from typing import Any, Callable, Dict, List, Optional
 
 from PyQt5.QtCore import QObject, pyqtSignal