diff --git a/dist/showdown.js b/dist/showdown.js
index 3fcd801..5f50a49 100644
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diff --git a/dist/showdown.js.map b/dist/showdown.js.map
index 6742b21..ef3fa87 100644
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diff --git a/dist/showdown.min.js b/dist/showdown.min.js
index 648f389..ceafb1f 100644
Binary files a/dist/showdown.min.js and b/dist/showdown.min.js differ
diff --git a/dist/showdown.min.js.map b/dist/showdown.min.js.map
index abfea65..9d6fabc 100644
Binary files a/dist/showdown.min.js.map and b/dist/showdown.min.js.map differ
diff --git a/src/subParsers/githubCodeBlocks.js b/src/subParsers/githubCodeBlocks.js
index 149849a..e7a7c6e 100644
--- a/src/subParsers/githubCodeBlocks.js
+++ b/src/subParsers/githubCodeBlocks.js
@@ -32,7 +32,7 @@ showdown.subParser('githubCodeBlocks', function (text, options, globals) {
     codeblock = codeblock.replace(/^\n+/g, ''); // trim leading newlines
     codeblock = codeblock.replace(/\n+$/g, ''); // trim trailing whitespace
 
-    codeblock = '<pre><code' + (language ? ' class="' + language + '"' : '') + '>' + codeblock + end + '</code></pre>';
+    codeblock = '<pre><code' + (language ? ' class="' + language + ' language-' + language + '"' : '') + '>' + codeblock + end + '</code></pre>';
 
     return showdown.subParser('hashBlock')(codeblock, options, globals);
   });
diff --git a/test/cases/github-style-codeblock.html b/test/cases/github-style-codeblock.html
index 0499ce4..8d593ae 100644
--- a/test/cases/github-style-codeblock.html
+++ b/test/cases/github-style-codeblock.html
@@ -7,5 +7,5 @@
 
 <p>And some HTML</p>
 
-<pre><code class="html">&lt;div&gt;HTML!&lt;/div&gt;
+<pre><code class="html language-html">&lt;div&gt;HTML!&lt;/div&gt;
 </code></pre>