diff --git a/kcmkwin/kwincompositing/qml/Effect.qml b/kcmkwin/kwincompositing/qml/Effect.qml
--- a/kcmkwin/kwincompositing/qml/Effect.qml
+++ b/kcmkwin/kwincompositing/qml/Effect.qml
@@ -21,6 +21,7 @@
 
 import QtQuick 2.1
 import QtQuick.Controls 1.1
+import QtQuick.Controls 2.0 as QQC2
 import QtQuick.Layouts 1.0
 import org.kde.kwin.kwincompositing 1.0
 
@@ -101,22 +102,22 @@
             id: effectItem
             property int maximumWidth: parent.maximumWidth - checkBoxLayout.width - (videoButton.width + configureButton.width + aboutButton.width) - parent.spacing * 5
             Layout.maximumWidth: maximumWidth
-            Label {
+            QQC2.Label {
                 text: model.NameRole
-                font.bold: true
+                font.weight: Font.Bold
                 wrapMode: Text.Wrap
                 Layout.maximumWidth: parent.maximumWidth
             }
-            Label {
+            QQC2.Label {
                 id: desc
                 text: model.DescriptionRole
                 wrapMode: Text.Wrap
                 Layout.maximumWidth: parent.maximumWidth
             }
-            Label {
+            QQC2.Label {
                 id:aboutItem
                 text: i18n("Author: %1\nLicense: %2", model.AuthorNameRole, model.LicenseRole)
-                font.bold: true
+                font.weight: Font.Bold
                 visible: false
                 wrapMode: Text.Wrap
                 Layout.maximumWidth: parent.maximumWidth
diff --git a/kcmkwin/kwincompositing/qml/EffectView.qml b/kcmkwin/kwincompositing/qml/EffectView.qml
--- a/kcmkwin/kwincompositing/qml/EffectView.qml
+++ b/kcmkwin/kwincompositing/qml/EffectView.qml
@@ -20,6 +20,7 @@
 
 import QtQuick 2.1
 import QtQuick.Controls 1.0
+import QtQuick.Controls 2.0 as QQC2
 import QtQuick.Layouts 1.0
 import org.kde.kwin.kwincompositing 1.0
 
@@ -35,12 +36,12 @@
             implicitHeight: sectionText.implicitHeight + 2 * col.spacing
             color: searchModel.backgroundNormalColor
 
-            Label {
+            QQC2.Label {
                 id: sectionText
                 x: col.spacing
                 y: col.spacing
                 text: section
-                font.bold: true
+                font.weight: Font.Bold
                 color: searchModel.sectionColor
                 anchors.horizontalCenter: parent.horizontalCenter
             }
@@ -58,7 +59,7 @@
         id: col
         anchors.fill: parent
 
-        Label {
+        QQC2.Label {
             id: hint
             text: i18n("Hint: To find out or configure how to activate an effect, look at the effect's settings.")
             anchors {
@@ -68,7 +69,7 @@
         }
 
         RowLayout {
-            TextField {
+            QQC2.TextField {
                 // TODO: needs clear button, missing in Qt
                 id: searchField
                 placeholderText: i18n("Search")
diff --git a/kcmkwin/kwindecoration/qml/Buttons.qml b/kcmkwin/kwindecoration/qml/Buttons.qml
--- a/kcmkwin/kwindecoration/qml/Buttons.qml
+++ b/kcmkwin/kwindecoration/qml/Buttons.qml
@@ -19,6 +19,7 @@
  */
 import QtQuick 2.3
 import QtQuick.Controls 1.2
+import QtQuick.Controls 2.0 as QQC2
 import QtQuick.Layouts 1.1
 import org.kde.kwin.private.kdecoration 1.0 as KDecoration
 import org.kde.kquickcontrolsaddons 2.0 as KQuickControlsAddons;
@@ -70,7 +71,7 @@
                         Layout.fillWidth: true
                         anchors.centerIn: parent
                         height: titlebar.implicitHeight
-                        Label {
+                        QQC2.Label {
                             id: titlebar
                             anchors.centerIn: parent
                             font: titleFont
@@ -165,7 +166,7 @@
                         Drag.keys: [ "decoButtonAdd" ]
                         Drag.active: dragArea.drag.active
                     }
-                    Label {
+                    QQC2.Label {
                         id: iconLabel
                         text: model["display"]
                         horizontalAlignment: Text.AlignHCenter
@@ -212,9 +213,9 @@
                 ColumnLayout {
                     anchors.centerIn: parent
                     visible: leftButtonsView.dragging || rightButtonsView.dragging
-                    Label {
+                    QQC2.Label {
                         text: i18n("Drop here to remove button")
-                        font.bold: true
+                        font.weight: Font.Bold
                     }
                     KQuickControlsAddons.QIconItem {
                         id: icon