diff --git a/src/package/contents/ui/ComboBox.qml b/src/package/contents/ui/ComboBox.qml
index 5c8f1b5..89f0aaa 100644
--- a/src/package/contents/ui/ComboBox.qml
+++ b/src/package/contents/ui/ComboBox.qml
@@ -164,6 +164,8 @@ RowLayout {
         }
 
         background: Rectangle {
+            implicitWidth: combobox.width
+            implicitHeight: combobox.height
             color: Qt.rgba(0, 0, 0, 0)
             border.color: theme.highlightColor
             border.width: combobox.down || combobox.customHovered ? 1 : 0