diff --git a/alarm_clock.yaml b/alarm_clock.yaml
index e841060..cfda2c0 100644
--- a/alarm_clock.yaml
+++ b/alarm_clock.yaml
@@ -18,6 +18,7 @@ blueprint:
         number:
           min: 0
           max: 30
+          unit_of_measurement: minutes
     turn_off_delay:
       name: Lights turn off delay
       description: Belay before the lights turn off after waking up
@@ -26,6 +27,7 @@ blueprint:
         number:
           min: 0
           max: 30
+          unit_of_measurement: minutes
     binary_condition:
       name: Alarm today
       description: Trigger the alarm today ?