diff --git a/requirements.txt b/requirements.txt
index b887990..6e8aa44 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,4 +22,5 @@ dbus-python==1.2.12
 toml==0.10.0
 python-dateutil==2.8.1
 websockets==8.1
+mpi4py
 RPi.GPIO