diff --git a/WebContent/qrcodes/qrcodes.css b/WebContent/qrcodes/qrcodes.css
index d0cab82f2..f3a2032b0 100644
--- a/WebContent/qrcodes/qrcodes.css
+++ b/WebContent/qrcodes/qrcodes.css
@@ -22,7 +22,7 @@ or see http://www.gnu.org/licenses/agpl.txt.
 /* page setup */
 body
 {
-	margin: 10;
+	margin: 10px;
 }
 
 /* ------------------------------------------------------------------------ */
@@ -38,6 +38,13 @@ body
 	text-align:center;
 }
 
+/* qrcode image for modern browsers */
+#qrcode
+{
+	display:block;
+	margin: 0px auto;
+}
+
 /* qrcode table for IE8 */
 .qrcode
 {