diff --git a/example/lib/camera_preview.dart b/example/lib/camera_preview.dart
index d848cf3..034e7b9 100644
--- a/example/lib/camera_preview.dart
+++ b/example/lib/camera_preview.dart
@@ -25,7 +25,7 @@ class CameraPreview extends StatelessWidget {
                       mainAxisSize: MainAxisSize.min,
                       children: [
                         CircleAvatar(
-                          backgroundColor: Colors.black.withOpacity(.5),
+                          backgroundColor: Colors.black.withValues(alpha: .5),
                           child: const Icon(
                             Icons.bolt,
                             color: Colors.white,
diff --git a/pubspec.yaml b/pubspec.yaml
index 96b4569..41f545a 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -11,7 +11,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  rxdart: ^0.27.0
+  rxdart: ^0.28.0
 
 dev_dependencies:
   flutter_test: