diff --git a/requirements.txt b/requirements.txt
index 49d6a7033dd..341fcd3cf81 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -76,3 +76,6 @@ python-forecastio>=1.3.3
 
 # Firmata Bindings (*.arduino)
 PyMata==2.07a
+
+# Mysensors serial gateway
+pyserial>=2.7