diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7426ac1..ee24ca7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+- Add a `"state": "on"` property to the MQTT messages sent on motion detection. This
+  makes it easier to build binary motion sensors based on the MQTT messages in Home Assistant
+  by using `value_template: 'value_json.state'` and `off_delay`. Resolves [issue 139](https://github.com/danecreekphotography/node-deepstackai-trigger/issues/139).
+
 ## Version 1.6.0
 
 - watchObjects is now case insensitive when comparing against the matched objects ([issue 134](https://github.com/danecreekphotography/node-deepstackai-trigger/issues/134))
diff --git a/src/handlers/mqttManager/MqttManager.ts b/src/handlers/mqttManager/MqttManager.ts
index 0d39094..4ae11b8 100644
--- a/src/handlers/mqttManager/MqttManager.ts
+++ b/src/handlers/mqttManager/MqttManager.ts
@@ -103,6 +103,7 @@ export async function processTrigger(
         fileName,
         basename: path.basename(fileName),
         predictions,
+        state: "on",
       }),
     ),
   ];