Wrap articles in an article element

articles/templates/articles/article_detail.html

@@ -1,6 +1,7 @@
 {% extends 'articles/base.html' %}
 
 {% block content %}
+    <article>
         <h1>{{ article.title }}</h1>
         <p>By: {{ article.author }}</p>
         <p>Published at: {{ article.published_at }}</p>
@@ -9,4 +10,5 @@
         <div>
             {{ article.get_formatted_content|safe }}
         </div>
+    </article>
 {% endblock %}