diff --git a/badges/ajax.php b/badges/ajax.php
index 76e8c26581b..0435a6cdc83 100644
--- a/badges/ajax.php
+++ b/badges/ajax.php
@@ -41,6 +41,8 @@ $result = badges_check_backpack_accessibility();
 $outcome = new stdClass();
 $outcome->code = $result;
 $outcome->response = get_string('error:backpacknotavailable', 'badges') . $OUTPUT->help_icon('backpackavailability', 'badges');
+
+echo $OUTPUT->header();
 echo json_encode($outcome);
 
 die();
diff --git a/badges/assertion.php b/badges/assertion.php
index 24b8e603310..df18a0af2a4 100644
--- a/badges/assertion.php
+++ b/badges/assertion.php
@@ -24,6 +24,8 @@
  * @author     Yuliya Bozhko <yuliya.bozhko@totaralms.com>
  */
 
+define('AJAX_SCRIPT', true);
+
 require_once(dirname(dirname(__FILE__)) . '/config.php');
 require_once($CFG->libdir . '/badgeslib.php');
 
@@ -35,6 +37,5 @@ $hash = required_param('b', PARAM_ALPHANUM);
 
 $badge = badges_get_issued_badge_info($hash);
 
-header('Content-type: application/json; charset=utf-8');
-
+echo $OUTPUT->header();
 echo json_encode($badge);
\ No newline at end of file
diff --git a/badges/backpackconnect.php b/badges/backpackconnect.php
index 55bc2ecf0c8..bbcc78f64d8 100644
--- a/badges/backpackconnect.php
+++ b/badges/backpackconnect.php
@@ -34,6 +34,7 @@ require_sesskey();
 require_login();
 $PAGE->set_url('/badges/backpackconnect.php');
 $PAGE->set_context(context_system::instance());
+echo $OUTPUT->header();
 
 // Use PHP input filtering as there is no PARAM type for
 // the type of cleaning that is required (ASCII chars 32-127 only).