diff --git a/public/static/common/css/common.css b/public/static/common/css/common.css
index d7a1b6d3d..87b76d096 100755
--- a/public/static/common/css/common.css
+++ b/public/static/common/css/common.css
@@ -5,6 +5,7 @@
 ul { list-style: none; }
 .none { display:none !important; }
 .block { display:block !important; }
+.vertical-middle { vertical-align: middle !important; }
 .text-deco-none { text-decoration: none !important; }
 .text-deco-line { text-decoration: underline !important; }