diff --git a/htdocs/statistics.php b/htdocs/statistics.php
index ee24901..ed1af11 100644
--- a/htdocs/statistics.php
+++ b/htdocs/statistics.php
@@ -17,6 +17,7 @@ $filter->render();
         
         var tag = $("<div></div>");
         var $dialog = tag.dialog({
+            modal: true,
             autoOpen: false,
             width: 800,
             height: 500,