diff --git a/index.html b/index.html
index 86fd0f83..e4545134 100644
--- a/index.html
+++ b/index.html
@@ -50,8 +50,8 @@
         terms of the MIT license.
       </p>
 
-      <div class="margin-y-medium text-center">
-        <a href="docs/installing.html" class="button button-big">Documentation &rarr;</a>
+      <div class="mar-y-md text-center">
+        <a href="docs/installing.html" class="button button-xl">Documentation &rarr;</a>
       </div>
 
       <p class="text-center">