diff --git a/_layouts/participant.html b/_layouts/participant.html
index 8005397..14aaec9 100644
--- a/_layouts/participant.html
+++ b/_layouts/participant.html
@@ -37,7 +37,7 @@ <h2 class="speaker-position">{{ page.tagline }}</h2>
                         </a>
                         {% endif %}
                         {% if page.mastodon %}
-                        <a href="https:{{ page.mastodon }}">
+                        <a href="https://mastodon.social/{{ page.mastodon }}">
                             <i class="fa fa-mastodon"></i>
                         </a>
                         {% endif %}