diff --git a/pyproject.toml b/pyproject.toml
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,6 +43,7 @@ dependencies = [
     "alsa-midi>=1.0.1",
     "treq>=22.2.0",
     "light9 @ file:///${PROJECT_ROOT}/",
+    "python-debouncer>=0.1.4",
 ]
 requires-python = ">=3.11"