diff --git a/classes/element_helper.php b/classes/element_helper.php
index 153dae0..2a1cffa 100644
--- a/classes/element_helper.php
+++ b/classes/element_helper.php
@@ -389,7 +389,7 @@ class element_helper {
      * @param int $elementid The element id
      * @return \context The context
      */
-    public static function get_context(int $elementid) : \context {
+    public static function get_context($elementid) {
         global $DB;
 
         $sql = "SELECT ct.contextid
diff --git a/element/categoryname/classes/element.php b/element/categoryname/classes/element.php
index 48d1578..e358589 100644
--- a/element/categoryname/classes/element.php
+++ b/element/categoryname/classes/element.php
@@ -63,7 +63,7 @@ class element extends \mod_customcert\element {
      *
      * @return string
      */
-    protected function get_category_name() : string {
+    protected function get_category_name() {
         global $DB, $SITE;
 
         $courseid = \mod_customcert\element_helper::get_courseid($this->get_id());
diff --git a/element/coursename/classes/element.php b/element/coursename/classes/element.php
index 87a1764..1012fa4 100644
--- a/element/coursename/classes/element.php
+++ b/element/coursename/classes/element.php
@@ -63,7 +63,7 @@ class element extends \mod_customcert\element {
      *
      * @return string
      */
-    protected function get_course_name() : string {
+    protected function get_course_name() {
         $courseid = \mod_customcert\element_helper::get_courseid($this->get_id());
         $course = get_course($courseid);
         $context = \mod_customcert\element_helper::get_context($this->get_id());
diff --git a/element/gradeitemname/classes/element.php b/element/gradeitemname/classes/element.php
index 401de90..4d287dc 100644
--- a/element/gradeitemname/classes/element.php
+++ b/element/gradeitemname/classes/element.php
@@ -114,7 +114,7 @@ class element extends \mod_customcert\element {
      *
      * @return string
      */
-    protected function get_grade_item_name() : string {
+    protected function get_grade_item_name() {
         global $DB;
 
         // Get the course module information.
diff --git a/element/text/classes/element.php b/element/text/classes/element.php
index c2a4f13..ccfdba6 100644
--- a/element/text/classes/element.php
+++ b/element/text/classes/element.php
@@ -100,7 +100,7 @@ class element extends \mod_customcert\element {
      *
      * @return string
      */
-    protected function get_text() : string {
+    protected function get_text() {
         $context = \mod_customcert\element_helper::get_context($this->get_id());
         return format_text($this->get_data(), FORMAT_HTML, ['context' => $context]);
     }
diff --git a/element/userfield/classes/element.php b/element/userfield/classes/element.php
index 84db94a..1148d6d 100644
--- a/element/userfield/classes/element.php
+++ b/element/userfield/classes/element.php
@@ -133,7 +133,7 @@ class element extends \mod_customcert\element {
      * @param bool $preview Is this a preview?
      * @return string
      */
-    protected function get_user_field_value(\stdClass $user, bool $preview) : string {
+    protected function get_user_field_value(\stdClass $user, $preview) {
         global $CFG, $DB;
 
         // The user field to display.