use QtQuick 6.0

package/contents/ui/main.qml

@@ -1,4 +1,4 @@
-import QtQuick 2.15
+import QtQuick 6.0
 import org.kde.kwin 3.0
 import org.kde.notification 1.0
 import "../code/main.js" as Karousel

src/utils/Delayer.ts

@@ -18,7 +18,7 @@ class Delayer {
 
 function initQmlTimer() {
     return Qt.createQmlObject(
-        `import QtQuick 2.15
+        `import QtQuick 6.0
         Timer {}`,
         qmlBase
     );