diff --git a/css/theme.default.css b/css/theme.default.css
index 8a54457d0..6c2a34621 100644
--- a/css/theme.default.css
+++ b/css/theme.default.css
@@ -15,7 +15,7 @@ Default Theme
 /* header */
 .tablesorter-default th,
 .tablesorter-default thead td {
-	font: bold 12px/18px Arial, Sans-serif;
+	font-weight: bold;
 	color: #000;
 	background-color: #fff;
 	border-collapse: collapse;