diff --git a/zkwebui/theme/default/css/theme.css.dsp b/zkwebui/theme/default/css/theme.css.dsp
index f9b028292b..66c716f012 100644
--- a/zkwebui/theme/default/css/theme.css.dsp
+++ b/zkwebui/theme/default/css/theme.css.dsp
@@ -5,6 +5,7 @@ html,body {
 	margin: 0;
 	padding: 0;
 	height: 100%;
+	width: 100%;
 	background-color: #D4E3F4;
 	overflow: hidden;
 }