diff --git a/core/css/guest.css b/core/css/guest.css
index b03e8d55efb..9a507876ad4 100644
--- a/core/css/guest.css
+++ b/core/css/guest.css
@@ -86,7 +86,7 @@ body {
 }
 .wrapper {
 	width: 300px;
-	margin-top: 10%;
+	margin-top: 10vh;
 }
 
 /* Default FORM */