diff --git a/format.php b/format.php
index 57f3b04..bb8b2d4 100644
--- a/format.php
+++ b/format.php
@@ -68,11 +68,19 @@
 // Include course format js module.
 $PAGE->requires->js('/course/format/designer/format.js');
 
+
 if ($ispopupactivities && !$PAGE->user_is_editing()) {
-    // Include popups.
-    $PAGE->requires->js_call_amd('format_popups/popups', 'init', array(
-        $context->id, $course->id, $displaysection
-    ));
+    if (get_config('format_designer', 'enabledeftresponse')) {
+        $socket = new \format_popups\socket($context);
+        $token = $socket->get_token();
+        $PAGE->requires->js_call_amd('format_popups/deft', 'init', array(
+            $context->id, $course->id, $displaysection, $token, get_config('block_deft', 'throttle')
+        ));
+    } else {
+        $PAGE->requires->js_call_amd('format_popups/popups', 'init', array(
+            $context->id, $course->id, $displaysection
+        ));
+    }
 }
 
 format_designer_editsetting_style($PAGE);
diff --git a/lang/en/format_designer.php b/lang/en/format_designer.php
index 89adf24..2caec45 100644
--- a/lang/en/format_designer.php
+++ b/lang/en/format_designer.php
@@ -289,8 +289,11 @@
 $string['makeherovisible'] = "Make hero activity and keep section 0 visible";
 $string['strprerequisites'] = "Prerequisites";
 $string['courseprerequisites'] = "Course prerequisites";
+$string['deftsettings'] = 'Deft response settings';
 $string['displaycourseprerequisites'] = "Display course prerequisites";
 $string['displaycourseprerequisites_help'] = "Define where to display the prerequisites courses";
+$string['enabledeftresponse'] = 'Enable Deft response';
+$string['enabledeftresponse_help'] = 'The Deft response block allows updating content users are viewing remotely when changes happen on a Moodle server. If that plugin is installed and activated and this is enabled, this format will update the course page when activities are modified. Find more information at {$a}.';
 $string['abovecoursecontents'] = "Above course contents";
 $string['onseparatetab'] = "On separate tab";
 $string['prerequisitesautostudents'] = "Automatically enrol students";
diff --git a/settings.php b/settings.php
index 99c40b6..1a901fa 100644
--- a/settings.php
+++ b/settings.php
@@ -61,6 +61,18 @@
         )
     );
 
+    $settings->add(new admin_setting_heading(
+        'format_designer/deftsettings',
+        new lang_string('deftsettings', 'format_designer'),
+        ''
+    ));
+    $link = '<a href="https://deftly.us" target="_blank">deftly.us</a>';
+    $settings->add(new admin_setting_configcheckbox( 'format_designer/enabledeftresponse',
+        new lang_string('enabledeftresponse', 'format_designer'),
+        new lang_string('enabledeftresponse_help', 'format_designer', $link),
+        0
+    ));
+
     // Hero activity.
     $name = 'format_designer_hero';
     $heading = get_string('heroactivity', 'format_designer');