diff --git a/doc/examples/box2d/contact_callbacks/lib/boundaries.dart b/doc/examples/box2d/contact_callbacks/lib/boundaries.dart
index ac8703967..43c0fece2 100644
--- a/doc/examples/box2d/contact_callbacks/lib/boundaries.dart
+++ b/doc/examples/box2d/contact_callbacks/lib/boundaries.dart
@@ -7,8 +7,8 @@ import 'package:flame/palette.dart';
 
 List<Wall> createBoundaries(Box2DComponent box) {
   final Viewport viewport = box.viewport;
-  final Vector2 screenSize = Vector2(viewport.width, viewport.height)
-      *viewport.scale;
+  final Vector2 screenSize =
+      Vector2(viewport.width, viewport.height) * viewport.scale;
   final Vector2 topLeft = viewport.getScreenToWorld(Vector2.zero());
   final Vector2 bottomRight = viewport.getScreenToWorld(screenSize);
   final Vector2 topRight = Vector2(bottomRight.x, topLeft.y);
diff --git a/doc/examples/box2d/contact_callbacks/lib/main.dart b/doc/examples/box2d/contact_callbacks/lib/main.dart
index 739be1813..07d002cff 100644
--- a/doc/examples/box2d/contact_callbacks/lib/main.dart
+++ b/doc/examples/box2d/contact_callbacks/lib/main.dart
@@ -27,7 +27,8 @@ class Ball extends BodyComponent {
   Paint _randomPaint() {
     math.Random rng = math.Random();
     return PaletteEntry(Color.fromARGB(rng.nextInt(255), rng.nextInt(255),
-        rng.nextInt(255), rng.nextInt(255))).paint;
+            rng.nextInt(255), rng.nextInt(255)))
+        .paint;
   }
 
   void _createBody(double radius, Vector2 position) {