diff --git a/appinfo/info.xml b/appinfo/info.xml
index 6d72844..0c4c844 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -22,7 +22,7 @@
     <category>auth</category>
     <dependencies>
         <php min-version="7.1"/>
-        <nextcloud min-version="18" max-version="19"/>
+        <nextcloud min-version="14" max-version="19"/>
     </dependencies>
     <settings>
         <admin>\OCA\UserSQL\Settings\Admin</admin>
diff --git a/lib/Backend/UserBackend.php b/lib/Backend/UserBackend.php
index 095fda3..fca2959 100644
--- a/lib/Backend/UserBackend.php
+++ b/lib/Backend/UserBackend.php
@@ -34,11 +34,9 @@ use OCA\UserSQL\Crypto\IPasswordAlgorithm;
 use OCA\UserSQL\Model\User;
 use OCA\UserSQL\Properties;
 use OCA\UserSQL\Repository\UserRepository;
-use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IConfig;
 use OCP\IL10N;
 use OCP\ILogger;
-use OCP\Security\Events\ValidatePasswordPolicyEvent;
 use OCP\User\Backend\ABackend;
 use OCP\User\Backend\ICheckPasswordBackend;
 use OCP\User\Backend\ICountUsersBackend;
@@ -98,10 +96,6 @@ final class UserBackend extends ABackend implements
      * @var EventDispatcher The event dispatcher.
      */
     private $eventDispatcher;
-	/**
-	 * @var IEventDispatcher The new event dispatcher.
-	 */
-    private $newEventDispatcher;
     /**
      * @var IUserAction[] The actions to execute.
      */
@@ -118,12 +112,11 @@ final class UserBackend extends ABackend implements
      * @param IL10N           $localization    The localization service.
      * @param IConfig         $config          The config instance.
      * @param EventDispatcher $eventDispatcher The event dispatcher.
-     * @param IEventDispatcher $newEventDispatcher The new event dispatcher.
      */
     public function __construct(
         $AppName, Cache $cache, ILogger $logger, Properties $properties,
         UserRepository $userRepository, IL10N $localization, IConfig $config,
-        EventDispatcher $eventDispatcher, IEventDispatcher $newEventDispatcher
+        EventDispatcher $eventDispatcher
     ) {
         $this->appName = $AppName;
         $this->cache = $cache;
@@ -133,7 +126,6 @@ final class UserBackend extends ABackend implements
         $this->localization = $localization;
         $this->config = $config;
         $this->eventDispatcher = $eventDispatcher;
-        $this->newEventDispatcher = $newEventDispatcher;
         $this->actions = [];
 
         $this->initActions();
@@ -523,8 +515,10 @@ final class UserBackend extends ABackend implements
             return false;
         }
 
-        $event = new ValidatePasswordPolicyEvent($password);
-        $this->newEventDispatcher->dispatchTyped($event);
+        $event = new GenericEvent($password);
+        $this->eventDispatcher->dispatch(
+            'OCP\PasswordPolicy::validate', $event
+        );
 
         $user = $this->userRepository->findByUid($uid);
         if (!($user instanceof User)) {