diff --git a/plugins/Toolbox/resources/qml/Toolbox.qml b/plugins/Toolbox/resources/qml/Toolbox.qml
index 7cc5a730f2..9ede2a6bda 100644
--- a/plugins/Toolbox/resources/qml/Toolbox.qml
+++ b/plugins/Toolbox/resources/qml/Toolbox.qml
@@ -14,8 +14,8 @@ Window
     modality: Qt.ApplicationModal
     flags: Qt.Dialog | Qt.CustomizeWindowHint | Qt.WindowTitleHint | Qt.WindowCloseButtonHint
 
-    width: 720 * screenScaleFactor
-    height: 640 * screenScaleFactor
+    width: Math.floor(720 * screenScaleFactor)
+    height: Math.floor(640 * screenScaleFactor)
     minimumWidth: width
     maximumWidth: minimumWidth
     minimumHeight: height
diff --git a/plugins/Toolbox/resources/qml/ToolboxDownloadsGrid.qml b/plugins/Toolbox/resources/qml/ToolboxDownloadsGrid.qml
index 8e15882ae1..85f0ff8be4 100644
--- a/plugins/Toolbox/resources/qml/ToolboxDownloadsGrid.qml
+++ b/plugins/Toolbox/resources/qml/ToolboxDownloadsGrid.qml
@@ -38,7 +38,7 @@ Column
             delegate: Loader
             {
                 asynchronous: true
-                width: (grid.width - (grid.columns - 1) * grid.columnSpacing) / grid.columns
+                width: Math.round((grid.width - (grid.columns - 1) * grid.columnSpacing) / grid.columns)
                 height: UM.Theme.getSize("toolbox_thumbnail_small").height
                 source: "ToolboxDownloadsGridTile.qml"
             }