diff --git a/parabolic_alarm.yaml b/parabolic_alarm.yaml
index ba767b5..3ae8020 100644
--- a/parabolic_alarm.yaml
+++ b/parabolic_alarm.yaml
@@ -39,6 +39,7 @@ blueprint:
             - domain:
                 - binary_sensor
           multiple: false
+      default: none
     person_sensor:
       name: 👤 Person Sensor
       description: Select the person sensor so that the alarm will only run when you are home.