diff --git a/multi/blog/Category-Theory-Presentation.erb b/multi/blog/Category-Theory-Presentation.erb
index a97b6d6fa..a3793874c 100644
--- a/multi/blog/Category-Theory-Presentation.erb
+++ b/multi/blog/Category-Theory-Presentation.erb
@@ -991,7 +991,7 @@ depth = cata phi where
   phi :: Algebra TreeF Int -- TreeF Int -> Int
   phi (Node x sons) = 1 + foldr max 0 sons</code></pre>
 <div class="flush"></div></section>
-<section class="slide">
+<section class="slide last">
 <h2 id="conclusion">Conclusion</h2>
 <p>Category Theory oriented Programming:</p>
 <ul>