diff --git a/_includes/header.html b/_includes/header.html
index b6f51d1..da3b6a9 100644
--- a/_includes/header.html
+++ b/_includes/header.html
@@ -6,7 +6,7 @@
 </div>
 <p class="p-note">Physicist, Programmer, Maker and Baker
 <p class="professional-links">
-  <a href="https://github.com/TomHodson" rel="me" class="u-url"><img class="icon" src="/assets/icons/github.svg">GitHub</a>
+  <a href="https://github.com/TomHodson" rel="me authn" class="u-url"><img class="icon" src="/assets/icons/github.svg">GitHub</a>
   <a href="https://twitter.com/T_Hodson" rel="me" class="u-url"><img class="icon" src="/assets/icons/twitter.svg"><s>Twitter</s></a>
   <a href="https://tech.lgbt/@Tomhodson" rel="me" class="u-url"><img class="icon" src="/assets/icons/mastodon.svg">Mastodon</a>
   <a href="/feed.xml"><img class="icon" src="/assets/icons/rss.svg">RSS</a>