diff --git a/booking.variety_admin.inc b/booking.variety_admin.inc
index 8797b9d..3baa87f 100644
--- a/booking.variety_admin.inc
+++ b/booking.variety_admin.inc
@@ -548,8 +548,8 @@ function booking_varietysessions_csv_report($timeslot_id) {
   $delimiter_esc = preg_quote($delimiter, '/');
   $enclosure_esc = preg_quote($enclosure, '/');
   // List of style options at https://github.com/mk-j/PHP_XLSXWriter/issues/198
-  $header_style = array( 'border'=>'bottom','border-style'=>'medium', 'border-color'=>'#000000',
-   'valign'=>'top', 'color'=>'#FFFFFF', 'fill'=>'#4A8C42', 'font-style' => 'bold');
+  $header_style = array( 'border'=>'bottom','border-style'=>'thin', 'border-color'=>'#000000',
+   'valign'=>'top', 'font-style' => 'bold');
 
   //get the list of variety session memberships
   $session_members_query = db_query("SELECT r.*, p.* FROM {booking_variety_regn} r