diff --git a/pyproject.toml b/pyproject.toml
index b1de8ed..b0bfbf0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,6 +40,7 @@ dependencies = [
     "RPi.GPIO",
     "gpiozero",
     "spidev",
+    "pyusb",
 ]
 
 [project.optional-dependencies]