diff --git a/xppl/static/css/style.css b/xppl/static/css/style.css
index bfba43a..0c794a4 100755
--- a/xppl/static/css/style.css
+++ b/xppl/static/css/style.css
@@ -349,6 +349,7 @@ th.headerSortDown {
   position: fixed;
   font-size: 18px;
   background-color: yellow;
+  z-index: 1000;
 }
 
 #annotindication {