diff --git a/metronomes/metronome.py b/metronomes/metronome.py
index 8c8b911..6bf2ef7 100644
--- a/metronomes/metronome.py
+++ b/metronomes/metronome.py
@@ -1,9 +1,9 @@
 from typing import Type, Callable, Union, Optional, Any
 
 try:
-    from typing import Literal
+    from typing import Literal  # type: ignore[attr-defined]
 except ImportError:  # pragma: no cover
-    from typing_extensions import Literal  # type: ignore[assignment]
+    from typing_extensions import Literal  # type: ignore[assignment, unused-ignore]
 
 from threading import Thread, RLock
 from time import perf_counter, sleep