diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5adca05b6..6f4f23f07 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,7 +9,7 @@ set(WEBSITE "https://github.com/psifidotos/Latte-Dock")
 set(BUG_ADDRESS "https://github.com/psifidotos/Latte-Dock/issues")
 set(FAQS "https://github.com/psifidotos/Latte-Dock/wiki/F.A.Q.")
 
-set(QT_MIN_VERSION "5.7.0")
+set(QT_MIN_VERSION "5.9.0")
 set(KF5_MIN_VERSION "5.38.0")
 
 set(KF5_LOCALE_PREFIX "")
@@ -48,7 +48,6 @@ include(ECMQMLModules)
 ecm_find_qmlmodule(QtQuick 2.7)
 ecm_find_qmlmodule(QtQuick.Layouts 1.3)
 ecm_find_qmlmodule(QtQuick.Controls 1.4)
-ecm_find_qmlmodule(QtQuick.Controls 2.0)
 ecm_find_qmlmodule(QtQuick.Controls.Styles.Plasma 2.0)
 ecm_find_qmlmodule(QtGraphicalEffects 1.0)
 ecm_find_qmlmodule(org.kde.kquickcontrolsaddons 2.0)
diff --git a/README.md b/README.md
index 96b1cec12..b49fdc8a4 100644
--- a/README.md
+++ b/README.md
@@ -20,9 +20,9 @@ We recommend that you use at least **Plasma 5.9.0**
 
 **development packages for:**
 ```bash
- Qt5Core >= 5.7.0
- Qt5Gui >= 5.7.0
- Qt5Dbus >= 5.7.0
+ Qt5Core >= 5.9.0
+ Qt5Gui >= 5.9.0
+ Qt5Dbus >= 5.9.0
 
  KF5Plasma >= 5.38.0
  KF5PlasmaQuick >= 5.38.0
diff --git a/shell/package/contents/configuration/AppearanceConfig.qml b/shell/package/contents/configuration/AppearanceConfig.qml
index 27a7f0431..7a41b79a7 100644
--- a/shell/package/contents/configuration/AppearanceConfig.qml
+++ b/shell/package/contents/configuration/AppearanceConfig.qml
@@ -163,6 +163,7 @@ PlasmaComponents.Page {
                     Layout.fillWidth: true
                     value: plasmoid.configuration.iconSize
                     from: 16
+                    to: 128
                     stepSize: (!plasmoid.configuration.autoDecreaseIconSize
                                && (plasmoid.configuration.advanced || (plasmoid.configuration.iconSize % 8 !== 0)))
                               || dialog.dockIsPanel ? 1 : 8
@@ -260,7 +261,7 @@ PlasmaComponents.Page {
                 PlasmaComponents.Label {
                     text: i18n("Screen Height Proportion:")
                     horizontalAlignment: Text.AlignLeft
-                    enabled: proportionSizeSlider.value >= proportionSizeSlider.realMinimum
+                    enabled: proportionSizeSlider.value !== proportionSizeSlider.from
                 }
 
                 LatteExtraControls.Slider {
@@ -271,11 +272,10 @@ PlasmaComponents.Page {
                     to: 10
                     stepSize: 0.5
                     wheelEnabled: false
-                    property real realMinimum: minimumValue + 0.5
 
                     function updateProportionIconSize() {
                         if (!pressed) {
-                            if(value<realMinimum) {
+                            if(value===1) {
                                 plasmoid.configuration.proportionIconSize = -1;
                             } else {
                                 plasmoid.configuration.proportionIconSize = value;
@@ -297,11 +297,11 @@ PlasmaComponents.Page {
                 }
 
                 PlasmaComponents.Label {
-                    text: proportionSizeSlider.value>=proportionSizeSlider.realMinimum ?
+                    text: proportionSizeSlider.value !== proportionSizeSlider.from ?
                               proportionSizeSlider.value.toFixed(1) + "%" : "---%"
                     horizontalAlignment: Text.AlignRight
                     Layout.minimumWidth: theme.mSize(theme.defaultFont).width * 4
-                    enabled: proportionSizeSlider.value >= proportionSizeSlider.realMinimum
+                    enabled: proportionSizeSlider.value !== proportionSizeSlider.from
                 }
             }
 
diff --git a/shell/package/contents/controls/Slider.qml b/shell/package/contents/controls/Slider.qml
index 6ec498cca..202adf484 100644
--- a/shell/package/contents/controls/Slider.qml
+++ b/shell/package/contents/controls/Slider.qml
@@ -32,7 +32,7 @@ T.Slider {
         Math.max(handle ? handle.implicitHeight : 0,
                  handle ? handle.implicitHeight : 0) + topPadding + bottomPadding)
 
-    padding: units.gridUnit
+    padding: 3*units.smallSpacing //5//units.gridUnit
     snapMode: T.Slider.SnapOnRelease
 
     PlasmaCore.Svg {
@@ -80,8 +80,10 @@ T.Slider {
             prefix: "groove-highlight"
             x: parent.horizontal ? 0 : (parent.width - width) / 2
             y: parent.horizontal ? (parent.height - height) / 2 : control.visualPosition * parent.height
-            width: parent.horizontal ? control.position * parent.width : parent.width
-            height: parent.horizontal ? parent.height : control.position * parent.height
+            width: parent.horizontal ? control.position * parent.width + invisibleSpacer : parent.width
+            height: parent.horizontal ? parent.height : control.position * parent.height + invisibleSpacer
+
+            property int invisibleSpacer: control.position === 0 ? 4 : 0
         }
     }
 }