diff --git a/lib/mqtt/mqttClient.js b/lib/mqtt/mqttClient.js
index 5c49ee4..9c57a2c 100644
--- a/lib/mqtt/mqttClient.js
+++ b/lib/mqtt/mqttClient.js
@@ -30,7 +30,7 @@ const mqttClient = function(events) {
   };
   this.ranges = {
     day: {low: 19.5, high: 22.5, max: 22.7},
-    night: {low: 17.5, high: 19.5, max: 19.7}
+    night: {low: 18.5, high: 20.5, max: 20.7}
   };
 
   this.first = false;