diff --git a/src/core/atcore.h b/src/core/atcore.h
--- a/src/core/atcore.h
+++ b/src/core/atcore.h
@@ -59,14 +59,14 @@
 class ATCORE_EXPORT AtCore : public QObject
 {
     Q_OBJECT
-    Q_PROPERTY(QString version READ version)
+    Q_PROPERTY(QString version READ version CONSTANT)
     Q_PROPERTY(QStringList availableFirmwarePlugins READ availableFirmwarePlugins)
     Q_PROPERTY(int extruderCount READ extruderCount WRITE setExtruderCount NOTIFY extruderCountChanged)
     Q_PROPERTY(int temperatureTimerInterval READ temperatureTimerInterval WRITE setTemperatureTimerInterval NOTIFY temperatureTimerIntervalChanged);
     Q_PROPERTY(int serialTimerInterval READ serialTimerInterval WRITE setSerialTimerInterval NOTIFY serialTimerIntervalChanged)
     Q_PROPERTY(QStringList serialPorts READ serialPorts NOTIFY portsChanged)
     Q_PROPERTY(float percentagePrinted READ percentagePrinted NOTIFY printProgressChanged)
-    Q_PROPERTY(QStringList portSpeeds READ portSpeeds)
+    Q_PROPERTY(QStringList portSpeeds READ portSpeeds CONSTANT)
     Q_PROPERTY(QString connectedPort READ connectedPort)
     Q_PROPERTY(AtCore::STATES state READ state WRITE setState NOTIFY stateChanged)
     Q_PROPERTY(bool sdMount READ isSdMounted WRITE setSdMounted NOTIFY sdMountChanged)