diff --git a/classes/load_template_form.php b/classes/load_template_form.php
index 961cc0d..bdf26f9 100644
--- a/classes/load_template_form.php
+++ b/classes/load_template_form.php
@@ -41,7 +41,7 @@ class load_template_form extends \moodleform {
         $mform->addElement('header', 'loadtemplateheader', get_string('loadtemplate', 'customcert'));
 
         $templates = $DB->get_records_menu('customcert_templates',
-            array('contextid' => \CONTEXT_SYSTEM::instance()->id), 'name ASC', 'id, name');
+            array('contextid' => \context_system::instance()->id), 'name ASC', 'id, name');
 
         $group = array();
         $group[] = $mform->createElement('select', 'ltid', '', $templates);
diff --git a/index.php b/index.php
index ac28912..52d895d 100644
--- a/index.php
+++ b/index.php
@@ -33,7 +33,7 @@ require_login($course);
 
 // Set up the page variables.
 $pageurl = new moodle_url('/mod/customcert/index.php', array('id' => $course->id));
-\mod_customcert\page_helper::page_setup($pageurl, CONTEXT_COURSE::instance($id),
+\mod_customcert\page_helper::page_setup($pageurl, context_course::instance($id),
     get_string('modulenameplural', 'customcert'));
 
 // Additional page setup needed.
diff --git a/manage_templates.php b/manage_templates.php
index b9b47aa..170b3c6 100644
--- a/manage_templates.php
+++ b/manage_templates.php
@@ -24,7 +24,7 @@
 
 require_once('../../config.php');
 
-$contextid = optional_param('contextid', CONTEXT_SYSTEM::instance()->id, PARAM_INT);
+$contextid = optional_param('contextid', context_system::instance()->id, PARAM_INT);
 $action = optional_param('action', '', PARAM_ALPHA);
 $confirm = optional_param('confirm', 0, PARAM_INT);