diff --git a/packages/flutter_markdown/example/demo.dart b/packages/flutter_markdown/example/demo.dart
index 64eb2ac899..f83b7f1cd8 100644
--- a/packages/flutter_markdown/example/demo.dart
+++ b/packages/flutter_markdown/example/demo.dart
@@ -29,8 +29,8 @@ Enjoy!
 void main() {
   runApp(new MaterialApp(
     title: "Markdown Demo",
-    routes: <String, RouteBuilder>{
-      '/': (RouteArguments args) => new Scaffold(
+    routes: <String, WidgetBuilder>{
+      '/': (BuildContext context) => new Scaffold(
         toolBar: new ToolBar(center: new Text("Markdown Demo")),
         body: new Markdown(data: _kMarkdownData)
       )