diff --git a/lib/assets/bg.gif b/lib/assets/bg.gif
deleted file mode 120000
index 12456d2..0000000
--- a/lib/assets/bg.gif
+++ /dev/null
@@ -1 +0,0 @@
-images/bg.gif
\ No newline at end of file
diff --git a/lib/assets/stylesheets/admin.css.less b/lib/assets/stylesheets/admin.css.less
index 89eadf6..075941e 100644
--- a/lib/assets/stylesheets/admin.css.less
+++ b/lib/assets/stylesheets/admin.css.less
@@ -1670,7 +1670,7 @@
   padding-right: 20px;
 }
 table.tablesorter thead tr .header {
-  background-image: url(bg.gif);
+  background-image: asset-url("bg.gif");
   background-repeat: no-repeat;
   background-position: center right;
   background-color: @orange_lighter_colour;
@@ -1679,10 +1679,10 @@
 
 
 table.tablesorter thead tr .headerSortUp {
-  background-image: url(asc.gif);
+  background-image: asset-url("asc.gif");
 }
 table.tablesorter thead tr .headerSortDown {
-  background-image: url(desc.gif);
+  background-image: asset-url("desc.gif");
 }