diff --git a/src/Skobkin/Bundle/PointToolsBundle/EventListener/UserSubscribersUpdatedListener.php b/src/Skobkin/Bundle/PointToolsBundle/EventListener/UserSubscribersUpdatedListener.php
index 987898d..20aa2dd 100644
--- a/src/Skobkin/Bundle/PointToolsBundle/EventListener/UserSubscribersUpdatedListener.php
+++ b/src/Skobkin/Bundle/PointToolsBundle/EventListener/UserSubscribersUpdatedListener.php
@@ -23,7 +23,7 @@ class UserSubscribersUpdatedListener
         $this->notifier = $notifier;
     }
 
-    public function onAppUserSubscribersUpdated(UserSubscribersUpdatedEvent $event)
+    public function onAppUserSubscribersUpdated(UserSubscribersUpdatedEvent $event): void
     {
         $this->notifier->sendUserSubscribersUpdatedNotification($event->getUser(), $event->getSubscribedUsers(), $event->getUnsubscribedUsers());
     }
diff --git a/src/Skobkin/Bundle/PointToolsBundle/EventListener/UsersRenamedListener.php b/src/Skobkin/Bundle/PointToolsBundle/EventListener/UsersRenamedListener.php
index fd4ae1c..23cbf70 100644
--- a/src/Skobkin/Bundle/PointToolsBundle/EventListener/UsersRenamedListener.php
+++ b/src/Skobkin/Bundle/PointToolsBundle/EventListener/UsersRenamedListener.php
@@ -23,7 +23,7 @@ class UsersRenamedListener
         $this->notifier = $notifier;
     }
 
-    public function onAppUsersRenamed(UsersRenamedEvent $event)
+    public function onAppUsersRenamed(UsersRenamedEvent $event): void
     {
         $this->notifier->sendUsersRenamedNotification($event->getRenames());
     }
diff --git a/src/Skobkin/Bundle/PointToolsBundle/EventListener/UsersUpdatedSubscriber.php b/src/Skobkin/Bundle/PointToolsBundle/EventListener/UsersUpdatedSubscriber.php
index 85ac976..01a36e5 100644
--- a/src/Skobkin/Bundle/PointToolsBundle/EventListener/UsersUpdatedSubscriber.php
+++ b/src/Skobkin/Bundle/PointToolsBundle/EventListener/UsersUpdatedSubscriber.php
@@ -36,7 +36,7 @@ class UsersUpdatedSubscriber implements EventSubscriber
         $this->eventDispatcher = $eventDispatcher;
     }
 
-    public function getSubscribedEvents()
+    public function getSubscribedEvents(): array
     {
         return [
             'preUpdate',
@@ -44,7 +44,7 @@ class UsersUpdatedSubscriber implements EventSubscriber
         ];
     }
 
-    public function preUpdate(PreUpdateEventArgs $event)
+    public function preUpdate(PreUpdateEventArgs $event): void
     {
         /** @var User $entity */
         $entity = $event->getObject();
@@ -58,7 +58,7 @@ class UsersUpdatedSubscriber implements EventSubscriber
         }
     }
 
-    public function postFlush(PostFlushEventArgs $event)
+    public function postFlush(PostFlushEventArgs $event): void
     {
         if (0 !== count($this->renames)) {
             // Creating event for dispatch