diff --git a/css/skeleton-auto.css b/css/skeleton-auto.css
index aca9efa..af4654f 100644
--- a/css/skeleton-auto.css
+++ b/css/skeleton-auto.css
@@ -263,7 +263,8 @@ hr {
 
 .zoom-box {
   margin: 0 auto;
-  width: 0 ;
+  width: 0;
+  height: 0;
  	-webkit-transition: -webkit-transform 0.2s;
 	transition: -webkit-transform 0.2s;
 	transition: transform 0.2s;