diff --git a/blog/templates/second-edition/base.html b/blog/templates/second-edition/base.html
index fb587d6b..913377a7 100644
--- a/blog/templates/second-edition/base.html
+++ b/blog/templates/second-edition/base.html
@@ -9,6 +9,7 @@
     <meta name="description" content="{{ config.description }}">
     <meta name="author" content="{{ config.extra.author.name }}">
 
+    <link rel="canonical" href="{{ current_url | safe }}" />
     <link href="/css/poole.css" rel="stylesheet">
     <link href="/css/main.css" rel="stylesheet">