diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index 3f06441..173ac41 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -52,6 +52,8 @@
     {{ partial "opengraph.html" . }}
     {{ partial "twitter_cards.html" . }}
 
+    <link rel="canonical" href="{{ .Permalink }}">
+
     {{ if hugo.IsServer }}
     <!-- KaTeX auto-rendering for when we don't have a post-processing step. -->
     <script defer src="https://cdn.jsdelivr.net/npm/katex@0.16.0/dist/katex.min.js" integrity="sha384-X/XCfMm41VSsqRNQgDerQczD69XqmjOOOwYQvr/uuC+j4OPoNhVgjdGFwhvN02Ja" crossorigin="anonymous"></script>