diff --git a/application/config/form_validation.php b/application/config/form_validation.php
index f16ddd0..82264ce 100644
--- a/application/config/form_validation.php
+++ b/application/config/form_validation.php
@@ -75,7 +75,7 @@ $config['auth/settings'] = array(
 		array(
 				'field' => 'job_check_interval',
 				'label' => _('Job checking interval'),
-				'rules' => 'greater_than[4]',
+				'rules' => 'greater_than[9]',
 		),
 		array(
 				'field' => 'projects_sort_recently',