Index: sources/gui/qml/components/ModalDialog.qml
===================================================================
diff -u -rb12cc2840bb819c5222bfd3bc2cc5ca6eb4c37fd -ra926324fec65c7f3cede4c746352af173f787458
--- sources/gui/qml/components/ModalDialog.qml	(.../ModalDialog.qml)	(revision b12cc2840bb819c5222bfd3bc2cc5ca6eb4c37fd)
+++ sources/gui/qml/components/ModalDialog.qml	(.../ModalDialog.qml)	(revision a926324fec65c7f3cede4c746352af173f787458)
@@ -16,7 +16,7 @@
 // Qt
 import QtQuick 2.12
 import QtQuick.Controls 2.12 // Dialog
-import Qt5Compat.GraphicalEffects
+import QtQuick.Effects
 
 // Project
 //  Qml imports
@@ -67,14 +67,10 @@
         radius          : Variables.dialogRadius
 
         layer.enabled   : showDropShadow
-        layer.effect: DropShadow {
+        layer.effect: RectangularShadow {
             id: _dropShadow
-            horizontalOffset: 4
-            verticalOffset  : 4
             radius          : 12
-            samples         : 32
             color           : Colors.dropShadowDialogColor
-            source          : _backgroundRect
             anchors.fill    : _backgroundRect
         }