diff --git a/dist/SimpleTopicSwitchItem.js b/dist/SimpleTopicSwitchItem.js
index 47050bb..537bcbf 100644
--- a/dist/SimpleTopicSwitchItem.js
+++ b/dist/SimpleTopicSwitchItem.js
@@ -40,10 +40,10 @@ class SimpleTopicSwitchItem extends AItem_1.AItem {
                 MqttDispatcher_1.mqttHandler.send(this.stateFeedbackTopic, this.state);
                 if (this.state != this.oldState) {
                     if (this.state == 'ON') {
-                        MqttDispatcher_1.mqttHandler.send(this.actionTopic, 'true');
+                        MqttDispatcher_1.mqttHandler.send(this.actionTopic, 'ON');
                     }
                     else {
-                        MqttDispatcher_1.mqttHandler.send(this.actionTopic, 'false');
+                        MqttDispatcher_1.mqttHandler.send(this.actionTopic, 'OFF');
                     }
                     this.oldState = this.state;
                 }
diff --git a/src/SimpleTopicSwitchItem.ts b/src/SimpleTopicSwitchItem.ts
index 50cfbf4..c46d6d4 100644
--- a/src/SimpleTopicSwitchItem.ts
+++ b/src/SimpleTopicSwitchItem.ts
@@ -57,9 +57,9 @@ export class SimpleTopicSwitchItem extends AItem implements HasStateAndFeedbackT
                 mqttHandler.send(this.stateFeedbackTopic, this.state)
                 if (this.state != this.oldState) {                
                     if (this.state == 'ON') {
-                        mqttHandler.send(this.actionTopic, 'true')
+                        mqttHandler.send(this.actionTopic, 'ON')
                     } else {
-                        mqttHandler.send(this.actionTopic, 'false')
+                        mqttHandler.send(this.actionTopic, 'OFF')
                     }
                     this.oldState = this.state
                 }