diff --git a/CHANGELOG.md b/CHANGELOG.md
index a186caa..84b2ed4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 0.5.0 (December 13, 2015)
+
+- Update `<iframe>` source attribute to point to `index.html` (so meta).
+- Add viewport `<meta>` tag to `<head>` of `index.html`.
+
 # 0.4.0 (August 17, 2015)
 
 - Add `<meter>` element (thanks @haroenv!). Reorganize a few existing elements.
diff --git a/index.html b/index.html
index 1d03e6a..fe5dce4 100644
--- a/index.html
+++ b/index.html
@@ -2,6 +2,7 @@
 <html lang="en">
 <head>
     <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>HTML5 Test Page</title>
 </head>
 <body>
@@ -321,7 +322,7 @@ p q r s t u v w x y z { | } ~ </pre>
 
                 <article id="embedded__iframe">
                     <header><h2>IFrame</h2></header>
-                    <div><iframe src="http://www.google.com" height="300"></iframe></div>
+                    <div><iframe src="index.html" height="300"></iframe></div>
                     <footer><p><a href="#top">[Top]</a></p></footer>
                 </article>
             </section>
