diff --git a/index.html b/index.html
index 1488ec0..188a7a4 100644
--- a/index.html
+++ b/index.html
@@ -11,7 +11,8 @@
 </a><a class="btn btn-lg btn-secondary me-3 mb-4" href=https://matrix.to/#/#openbikesensor:matrix.org rel="noopener noreferrer nofollow"><img alt="Matrix logo" src="/icons/matrix favicon.svg" width=26pt style=vertical-align:top> Matrix
 </a><a class="btn btn-lg btn-secondary me-3 mb-4" href=https://github.com/openbikesensor target=_blank rel="noopener noreferrer nofollow"><i class="fab fa-github me-1"></i> GitHub
 </a><a class="btn btn-lg btn-secondary me-3 mb-4" href=/docs/><i class="fas fa-book-open me-1"></i> Dokumentation
-</a><a class="btn btn-lg btn-secondary me-3 mb-4" href=#unterstuetzen rel="noopener noreferrer nofollow"><i class="fas fa-hand-holding-heart me-1"></i> Unterstützen</a></div></div></div></div></div></div></div></section><div><a id=td-block-1 class=td-offset-anchor></a></div><section class="row td-box td-box--primary td-box--height-auto"><div class=col><div class=container><div class=container><div class=row style=padding:0><div class="col-lg-4 col-md-6 mb-5 mb-lg-0 position-relative feature-cell"><i class="feature-icon fab fa-discourse"></i><h4 class=h3>Fragen und Diskutieren</h4><p class=mb-0><p>Komm in unser Discourse-Forum, und diskutiere mit den anderen Interessierten
+</a><a class="btn btn-lg btn-secondary me-3 mb-4" href=#unterstuetzen rel="noopener noreferrer nofollow"><i class="fas fa-hand-holding-heart me-1"></i> Unterstützen
+</a><a class="btn btn-lg btn-secondary me-3 mb-4" href=https://verkehrswende.social/@OpenBikeSensor target=_blank rel="me noopener noreferrer nofollow"><i class="fab fa-mastodon me-1"></i> Mastodon</a></div></div></div></div></div></div></div></section><div><a id=td-block-1 class=td-offset-anchor></a></div><section class="row td-box td-box--primary td-box--height-auto"><div class=col><div class=container><div class=container><div class=row style=padding:0><div class="col-lg-4 col-md-6 mb-5 mb-lg-0 position-relative feature-cell"><i class="feature-icon fab fa-discourse"></i><h4 class=h3>Fragen und Diskutieren</h4><p class=mb-0><p>Komm in unser Discourse-Forum, und diskutiere mit den anderen Interessierten
 und Aktiven. Hier findet fast alles einen Platz: Unterstützung bei Problemen,
 Lokalgruppen, Forschungs­projekte, Events, Entwicklungsthemen, und vieles mehr.</p></p><p class=mt-auto><a href=https://forum.openbikesensor.org class="btn btn-outline-light">Zum Forum <i class="fa fa-arrow-right ms-2"></i></a></p></div><div class="col-lg-4 col-md-6 mb-5 mb-lg-0 position-relative feature-cell"><i class="feature-icon fas fa-biking"></i><h4 class=h3>Bauen & Daten sammeln</h4><p class=mb-0><p>Bau Dir Deinen eigenen Überholabstandsmesser. Wir unterstützen Dich dabei. Am
 besten schließt Du Dich einer der Sammelbestellungen und einem unserer
diff --git a/sitemap.xml b/sitemap.xml
index 04a5ef0..706aa48 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -1 +1 @@
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