diff --git a/esphome/esp-attobattery.yaml b/esphome/esp-attobattery.yaml
index d0f0a7a..94b63e7 100644
--- a/esphome/esp-attobattery.yaml
+++ b/esphome/esp-attobattery.yaml
@@ -159,13 +159,13 @@ mqtt:
   # Control deep sleep over MQTT
   on_message:
     - topic: ${mqtt_command_topic}/deepsleep
-      payload: "ON"
+      payload: "On"
       then:
         - deep_sleep.allow: deep_sleep_1
         - logger.log: "Deep sleep ALLOWED via MQTT. Device will sleep when run_duration elapses."
 
     - topic: ${mqtt_command_topic}/deepsleep
-      payload: "OFF"
+      payload: "Off"
       then:
         - deep_sleep.prevent: deep_sleep_1
         - logger.log: "Deep sleep PREVENTED via MQTT."