diff --git a/index.html b/index.html
index b57697e..7bb3955 100644
--- a/index.html
+++ b/index.html
@@ -26,6 +26,7 @@
     <script src="https://unpkg.com/htmx.org"></script>
     <script src="https://unpkg.com/htmx.org/dist/ext/client-side-templates.js"></script>
     <script src="https://unpkg.com/mustache@latest"></script>
+    <link rel="canonical" href="https://gong.gp/" />
     <link rel="icon" href="./favicon.ico" type="image/x-icon" sizes="32x32"/>
     <link rel="icon" href="./icon.png" type="image/png" sizes="192x192"/>
     <link rel="apple-touch-icon" href="./apple-icon.png" type="image/png" sizes="192x192"/>