diff --git a/restui.module b/restui.module
index 6e12877..7d2d305 100644
--- a/restui.module
+++ b/restui.module
@@ -46,8 +46,8 @@ function restui_theme() {
  * Sets defaults for authentication and formats per HTTP method.
  */
 function restui_preprocess_restui_resource_info(&$variables) {
-  $formats = drupal_container()->getParameter('serializer.formats');
-  $authentication_providers = array_keys(drupal_container()->get('authentication')->getSortedProviders());
+  $formats = \Drupal::getContainer()->getParameter('serializer.formats');
+  $authentication_providers = array_keys(\Drupal::service('authentication')->getSortedProviders());
   foreach ($variables['resource'] as $method => $properties) {
     if (empty($properties['supported_formats'])) {
       $variables['resource'][$method]['supported_formats'] = $formats;