diff --git a/source/_layouts/base.html.twig b/source/_layouts/base.html.twig
index 098fd48..d9c6d1d 100644
--- a/source/_layouts/base.html.twig
+++ b/source/_layouts/base.html.twig
@@ -4,7 +4,7 @@
     <meta charset="UTF-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    <link rel="canonical" href="{{ site.url }}{{ page.url|trim('/', 'right') }}" />
+    <link rel="canonical" href="{{ site.url }}{{ page.url|trim('/', 'right') }}">
     <title>{{ page.title }} - {{ site.name }}</title>
   </head>
   <body>
@@ -15,7 +15,7 @@
         {% block content %}{% endblock %}
       {% endblock %}
 
-      <hr />
+      <hr>
 
       <footer>
         <p>This website is open source. <a href="{{ site.github.url }}/edit/main/source/{{ page.relative_pathname }}">Improve this page</a>.</p>
diff --git a/source/_layouts/zet.html.twig b/source/_layouts/zet.html.twig
index c65500a..fbdd387 100644
--- a/source/_layouts/zet.html.twig
+++ b/source/_layouts/zet.html.twig
@@ -9,7 +9,7 @@
 {% endblock %}
 
 {% block content_wrapper %}
-  <time date="{{ page.date|date('c') }}">{{ page.date|date }}</time>
+  <time datetime="{{ page.date|date('c') }}">{{ page.date|date }}</time>
 
   {% block content %}{% endblock %}
 
