diff --git a/dragonups.cpp b/dragonups.cpp
index 206e5e8..59b372c 100644
--- a/dragonups.cpp
+++ b/dragonups.cpp
@@ -64,7 +64,7 @@ bool DragonUPS::initProperties()
                        60, IPS_IDLE);
 
     // WeatherInterface
-    addParameter("SENSOR_VOLTAGE", "Voltage (V)", 12.5, 14.0, 5);
+    addParameter("SENSOR_VOLTAGE", "Voltage (V)", 12.5, 14.4, 5);
     setCriticalParameter("SENSOR_VOLTAGE");
 
     tcpConnection = new Connection::TCP(this);