diff --git a/lib/widgets/motion_toast_background.dart b/lib/widgets/motion_toast_background.dart
index e88185a..c3acf4d 100644
--- a/lib/widgets/motion_toast_background.dart
+++ b/lib/widgets/motion_toast_background.dart
@@ -24,7 +24,9 @@ class MotionToastBackground extends StatelessWidget {
   Widget build(BuildContext context) {
     return Container(
       decoration: BoxDecoration(
-        color: backgroundColor.withOpacity(opacity),
+        color: backgroundColor.withValues(
+          alpha: opacity,
+        ),
         borderRadius: BorderRadius.all(
           Radius.circular(borderRadius),
         ),