diff --git a/index.html b/index.html
index af3dac96f..1cd4c06af 100644
--- a/index.html
+++ b/index.html
@@ -248,7 +248,7 @@ <h6>app/controllers/articles_controller.rb</h6>
 
   private
     def article_params
-      params.require(:article).permit(:title, :content)
+      params.expect(article: [ :title, :content ])
     end
 end
 {% endhighlight %}