diff --git a/demos/classes.html b/demos/classes.html
index 75babc5..7313b07 100644
--- a/demos/classes.html
+++ b/demos/classes.html
@@ -417,7 +417,7 @@
               </div>
               <!-- end .column -->
               <div class="column">
-                <figure><img src="../static/images/setup.png" alt="WebSlides Files"></figure>
+                <figure><img class="aligncenter" src="../static/images/setup.png" alt="WebSlides Files"></figure>
               </div>
               <!-- end .column -->
               <div class="column">
@@ -444,7 +444,7 @@
               </div>
               <!-- end .column -->
               <div class="column">
-                <figure><img src="../static/images/setup.png" alt="WebSlides Files"></figure>
+                <figure><img class="aligncenter" src="../static/images/setup.png" alt="WebSlides Files"></figure>
               </div>
               <!-- end .column -->
               <div class="column">