diff --git a/mailpoet/lib/Newsletter/Sending/ScheduledTaskSubscribersRepository.php b/mailpoet/lib/Newsletter/Sending/ScheduledTaskSubscribersRepository.php
index d995666808..99f04412e5 100644
--- a/mailpoet/lib/Newsletter/Sending/ScheduledTaskSubscribersRepository.php
+++ b/mailpoet/lib/Newsletter/Sending/ScheduledTaskSubscribersRepository.php
@@ -7,6 +7,7 @@ use MailPoet\Entities\ScheduledTaskEntity;
 use MailPoet\Entities\ScheduledTaskSubscriberEntity;
 use MailPoet\Entities\SubscriberEntity;
 use MailPoet\InvalidStateException;
+use MailPoetVendor\Doctrine\DBAL\Connection;
 use MailPoetVendor\Doctrine\ORM\QueryBuilder;
 
 /**
@@ -86,6 +87,33 @@ class ScheduledTaskSubscribersRepository extends Repository {
       ->execute();
   }
 
+  /**
+   * @param int[] $subscriberIds
+   */
+  public function updateProcessedSubscribers(ScheduledTaskEntity $task, array $subscriberIds): void {
+    if ($subscriberIds) {
+      $this->entityManager->createQueryBuilder()
+        ->update(ScheduledTaskSubscriberEntity::class, 'sts')
+        ->set('sts.processed', ScheduledTaskSubscriberEntity::STATUS_PROCESSED)
+        ->where('sts.subscriber IN (:subscriberIds)')
+        ->andWhere('sts.task = :task')
+        ->setParameter('subscriberIds', $subscriberIds, Connection::PARAM_INT_ARRAY)
+        ->setParameter('task', $task)
+        ->getQuery()
+        ->execute();
+    }
+
+    $this->checkCompleted($task);
+  }
+
+  private function checkCompleted(ScheduledTaskEntity $task): void {
+    $count = $this->countBy(['task' => $task, 'processed' => ScheduledTaskSubscriberEntity::STATUS_UNPROCESSED]);
+    if ($count === 0) {
+      $task->setStatus(ScheduledTaskEntity::STATUS_COMPLETED);
+      $this->entityManager->flush();
+    }
+  }
+
   private function getBaseSubscribersIdsBatchForTaskQuery(int $taskId, int $lastProcessedSubscriberId): QueryBuilder {
     return $this->entityManager
       ->createQueryBuilder()