diff --git a/plinth/modules/help/templates/help_about.html b/plinth/modules/help/templates/help_about.html
index 1ce193457..154bbe5b7 100644
--- a/plinth/modules/help/templates/help_about.html
+++ b/plinth/modules/help/templates/help_about.html
@@ -55,7 +55,7 @@
     {% endblocktrans %}
   </p>
 
-  <p><a class="btn btn-primary btn-lg"
+  <p><a class="btn btn-primary"
         href="https://wiki.debian.org/FreedomBox"
         target="_blank">{% trans "Learn more &raquo;" %}</a></p>