diff --git a/mqtt-io/requirements.txt b/mqtt-io/requirements.txt
index 5b84cf0..5ba8661 100644
--- a/mqtt-io/requirements.txt
+++ b/mqtt-io/requirements.txt
@@ -16,5 +16,5 @@ pifacedigitalio==3.0.5
 pyserial==3.5
 RPi.bme280==0.2.4
 RPi.GPIO==0.7.1
-smbus2==0.4.3
+smbus2==0.5.0
 w1thermsensor==2.3.0