--- htmlbox.module (saved version)
+++ (current document)
@@ -23,6 +23,7 @@
     'description'      => 'Specify where the HTMLBox will be visible.',
     'page callback'    => 'drupal_get_form',
     'page arguments'   => array('htmlbox_admin_settings_visibility'),
+    'access arguments' => array('administer site configuration'),
     'type'             => MENU_DEFAULT_LOCAL_TASK,
   );
   $items['admin/settings/htmlbox/options'] = array(
@@ -32,6 +33,7 @@
     'page arguments'   => array('htmlbox_admin_settings_options'),
     'type'             => MENU_LOCAL_TASK,
     'weight'           => 1,
+    'access arguments' => array('administer site configuration'),
   );
 
   return $items;