diff --git a/README.html b/README.html
index 6be938f..25b0cb6 100644
--- a/README.html
+++ b/README.html
@@ -20,7 +20,7 @@ <h2 id="contributing">How to contribute annotations</h2>
 <li>If you don’t have one already, create a
  <a href="https://github.com/signup/free">GitHub user account</a>.</li>
 <li>Use the GitHub Web UI to
-<a href="http://github.com/es5/es5.github.io#fork_box"
+<a href="https://github.com/es5/es5.github.io#fork_box"
 >create your own fork of the es5-spec git repository</a>
 and check it out to make a local es5-spec workspace.</li>
 <li>Create the annotation in your workspace, using the next two
@@ -46,7 +46,7 @@ <h2 id="contributing">How to contribute annotations</h2>
   to your local git repository, then push it to your GitHub
   es5-spec fork.</li>
 <li>Send a
-  <a href="http://github.com/es5/es5.github.io/pulls">GitHub es5-spec pull request</a>
+  <a href="https://github.com/es5/es5.github.io/pulls">GitHub es5-spec pull request</a>
    so that your change can be committed into the upstream source.</li>
 </ol>
 
@@ -59,7 +59,7 @@ <h2>Important</h2>
 assisting in its implementation.</p>
 
 <div id="stamp">
-  <p><img id="mascot" src="http://es5.github.io/js-mascot.svg"
+  <p><img id="mascot" src="https://es5.github.io/js-mascot.svg"
         alt=""></p>
   <p id="slogan">Ex igne vita.</p>
 </div>
diff --git a/README.md b/README.md
index 181a164..e4b3cff 100644
--- a/README.md
+++ b/README.md
@@ -37,9 +37,9 @@ committed into the upstream source.
 
    [1]: https://github.com/signup/free
 
-   [2]: http://github.com/es5/es5.github.io#fork_box
+   [2]: https://github.com/es5/es5.github.io#fork_box
 
-   [3]: http://github.com/es5/es5.github.io/pulls
+   [3]: https://github.com/es5/es5.github.io/pulls
 
 ## Important
 
@@ -51,7 +51,7 @@ implementation.
 
 ![][4]
 
-   [4]: http://es5.github.io/js-mascot.svg
+   [4]: https://es5.github.io/js-mascot.svg
 
 Ex igne vita.
 
diff --git a/key.html b/key.html
index eb99e01..e79f9fc 100644
--- a/key.html
+++ b/key.html
@@ -26,7 +26,7 @@ <h3 id="key">Key to the markers</h3>
   copied, modified, republished, redistributed, etc., as permitted
   by that license. If you’d like to contribute annotations, see
   the
-  <a href="http://github.com/es5/es5.github.io/#readme">instructions on the Annotated ES5 project page</a>.</dd>
+  <a href="https://github.com/es5/es5.github.io/#readme">instructions on the Annotated ES5 project page</a>.</dd>
 
 <dt><b>Ⓑ</b> bugs.ecmascript.org issues</dt>
 <dd>Direct hyperlinks to <a href="https://bugs.ecmascript.org/">bugs.ecmascript.org</a> issues.</dd>
diff --git a/timestamp.js b/timestamp.js
index 6284f9c..58274a0 100644
--- a/timestamp.js
+++ b/timestamp.js
@@ -1,7 +1,7 @@
 function addTimestamp() {
   var link = document.createElement("A"),
       d = new Date(document.lastModified);
-  // script.src = "http://github.com/api/v2/json/repos/show/es5/es5.github.io?callback=jsonp";
+  // script.src = "https://github.com/api/v2/json/repos/show/es5/es5.github.io?callback=jsonp";
   link.href = "https://github.com/es5/es5.github.io/commits/";
   document.getElementById("timestamp").appendChild(link);
   link.textContent = "Last\u00A0updated:\u00A0" + d.toISOString().substring(0, 10);