diff --git a/web/css/style.css b/web/css/style.css
index eb70d20..e86ca54 100644
--- a/web/css/style.css
+++ b/web/css/style.css
@@ -1,7 +1,7 @@
 article,aside,details,figcaption,figure,footer,header,hgroup,nav,section{display:block;}
 audio,canvas,video{display:inline-block;*display:inline;*zoom:1;}
 audio:not([controls]){display:none;}
-html{font-size:100%;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;}
+html{font-size:100%;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;overflow-y:scroll;-moz-scrollbars-vertical;-ms-overflow-y:scroll;}
 a:focus{outline:thin dotted #333;outline:5px auto -webkit-focus-ring-color;outline-offset:-2px;}
 a:hover,a:active{outline:0;}
 sub,sup{position:relative;font-size:75%;line-height:0;vertical-align:baseline;}