diff --git a/src/Plugin/monitoring/SensorPlugin/UpdateStatusSensorPlugin.php b/src/Plugin/monitoring/SensorPlugin/UpdateStatusSensorPlugin.php
index 93f2c32..0b53bea 100644
--- a/src/Plugin/monitoring/SensorPlugin/UpdateStatusSensorPlugin.php
+++ b/src/Plugin/monitoring/SensorPlugin/UpdateStatusSensorPlugin.php
@@ -6,6 +6,7 @@
 
 namespace Drupal\monitoring\Plugin\monitoring\SensorPlugin;
 
+use Drupal\Core\Extension\Requirement\RequirementSeverity;
 use Drupal\Core\StringTranslation\TranslatableMarkup;
 use Drupal\monitoring\Attribute\SensorPlugin;
 use Drupal\monitoring\Result\SensorResultInterface;
@@ -199,15 +200,15 @@ class UpdateStatusSensorPlugin extends SensorPluginBase {
       'severity' => REQUIREMENT_OK,
     );
 
-    if ($update_info['severity'] == REQUIREMENT_OK) {
+    if ($update_info['severity'] === RequirementSeverity::OK) {
       return SensorResultInterface::STATUS_OK;
     }
-    elseif ($update_info['severity'] == REQUIREMENT_INFO) {
+    elseif ($update_info['severity'] == RequirementSeverity::Info) {
       return SensorResultInterface::STATUS_INFO;
     }
     // If the level is warning, which is updates available, we do not need to
     // escalate.
-    elseif ($update_info['severity'] == REQUIREMENT_WARNING) {
+    elseif ($update_info['severity'] == RequirementSeverity::Warning) {
       return SensorResultInterface::STATUS_INFO;
     }
     else {