diff --git a/CHANGES.md b/CHANGES.md
index 0580f790c0d9df3644e549289195e06d3d23c683..65d62fb4c821ad37bc7b698406989382ad17d09d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -6,6 +6,7 @@ Changes
 
 ### Unreleased
 
+* 2019-05-31 - Fixed referencing of renderers due to upstream changes in theme Boost.
 * 2019-05-31 - Prepare compatibility for Moodle 3.7.
 
 ### Release v3.6-r5
diff --git a/classes/output/core/course_renderer.php b/classes/output/core/course_renderer.php
index 226974ddd7352669fa3f9490c9aedaf38ead2e8a..cfc108a5e4ce6c847784066cff4e87c60d259263 100644
--- a/classes/output/core/course_renderer.php
+++ b/classes/output/core/course_renderer.php
@@ -32,6 +32,7 @@ use html_writer;
 global $CFG;
 
 require_once($CFG->dirroot . '/course/renderer.php');
+
 /**
  * Extending the course_renderer interface.
  *
@@ -40,7 +41,7 @@ require_once($CFG->dirroot . '/course/renderer.php');
  * @package theme_boost_campus
  * @category output
  */
-class course_renderer extends \theme_boost\output\core\course_renderer {
+class course_renderer extends \core_course_renderer {
 
     /**
      * Displays one course in the list of courses.
diff --git a/classes/output/core_renderer.php b/classes/output/core_renderer.php
index 58a16df5cdee4186a5e96b92d559e898db36df12..5128c667a82259a00209dee2aebfef340e515832 100644
--- a/classes/output/core_renderer.php
+++ b/classes/output/core_renderer.php
@@ -57,7 +57,7 @@ defined('MOODLE_INTERNAL') || die;
  * @package theme_boost_campus
  * @category output
  */
-class core_renderer extends \theme_boost\output\core_renderer {
+class core_renderer extends \core_renderer {
 
     /**
      * Override to display an edit button again by calling the parent function