diff --git a/README.md b/README.md
index 0368503..1f1368a 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,8 @@ Install system dependencies (`apt-get`):
 * `libportaudio2` (for `sounddevice`)
 * `build-essential` (for `pymicro-features`)
 * `libmpv-dev` (for `python-mpv`)
+* `mpv` (for testing)
+* `libmpv-dev` (for building spidev)
 
 Clone and install project: