diff --git a/templates/snippets/file_content_js.html b/templates/snippets/file_content_js.html
index 1cdf76d0e6..2bce6cd1ef 100644
--- a/templates/snippets/file_content_js.html
+++ b/templates/snippets/file_content_js.html
@@ -46,7 +46,8 @@ window.onload = function () {
 
 {% if filetype == 'Markdown' %}
     {% ifnotequal file_content None %}
-    var converter = new Showdown.converter();
+    var converter = new Markdown.Converter();
+    Markdown.Extra.init(converter, {extensions: ["fenced_code_gfm"]});
     $('#md-view').html(converter.makeHtml('{{ file_content|escapejs }}')).children(':first').css('margin-top', '0');
     {% endifnotequal %}
 {% endif %}
diff --git a/templates/snippets/file_view_js.html b/templates/snippets/file_view_js.html
index f652bf43f5..ce3b5e28e2 100644
--- a/templates/snippets/file_view_js.html
+++ b/templates/snippets/file_view_js.html
@@ -11,5 +11,6 @@
 <script src="{{MEDIA_URL}}js/mediaelement-and-player.min.js"></script>
 {% endif %}
 {% if filetype == 'Markdown' %}
-<script type="text/javascript" src="{{MEDIA_URL}}js/showdown.js"></script>
+<script type="text/javascript" src="{{MEDIA_URL}}js/Markdown.Converter.js"></script>
+<script type="text/javascript" src="{{MEDIA_URL}}js/Markdown.Extra.js"></script>
 {% endif %}