diff --git a/omicron/ssg/templates/plain/article.html b/omicron/ssg/templates/plain/article.html
index b160862..0f2e940 100644
--- a/omicron/ssg/templates/plain/article.html
+++ b/omicron/ssg/templates/plain/article.html
@@ -2,6 +2,8 @@
 
 {% block title %}{{ article.title }} — {{ site.name }}{% endblock %}
 
+{% block head %}<link rel="canonical" href="{{ site.origin }}{{ site.base_dir }}{{ article.uri }}">{% endblock %}
+
 {% block main %}
 <article>
     <header>
diff --git a/omicron/ssg/templates/plain/base.html b/omicron/ssg/templates/plain/base.html
index 849e9a7..346b7ab 100644
--- a/omicron/ssg/templates/plain/base.html
+++ b/omicron/ssg/templates/plain/base.html
@@ -5,6 +5,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>{% block title %}{{ site.name }}{% endblock %}</title>
     <link rel="stylesheet" href="{{ site.base_dir }}pygments.css">
+    {% block head %}{% endblock %}
 </head>
 <body>
     <header>
diff --git a/omicron/ssg/templates/plain/index.html b/omicron/ssg/templates/plain/index.html
index 8135e06..352bc11 100644
--- a/omicron/ssg/templates/plain/index.html
+++ b/omicron/ssg/templates/plain/index.html
@@ -2,6 +2,8 @@
 
 {% block title %}{% if section %}{{ section }} — {% endif %}{{ site.name }}{% if page_num > 1 %} — Page {{ page_num }}{% endif %}{% endblock %}
 
+{% block head %}<link rel="canonical" href="{{ site.origin }}{{ site.base_dir }}{% if section %}{{ section }}/{% endif %}{% if page_num == 1 %}{% else %}page-{{ page_num }}.html{% endif %}">{% endblock %}
+
 {% block main %}
 {% if section %}<h1>{{ section }}</h1>{% endif %}
 {% for item in items %}
