diff --git a/lib/Cron/Workers/SendingQueue/SendingQueue.php b/lib/Cron/Workers/SendingQueue/SendingQueue.php
index 8e825e23bd..435d5abbd8 100644
--- a/lib/Cron/Workers/SendingQueue/SendingQueue.php
+++ b/lib/Cron/Workers/SendingQueue/SendingQueue.php
@@ -41,7 +41,7 @@ class SendingQueue {
         $queue->save();
       }
       // get subscribers
-      $queue->subscribers = SubscribersTask::get($queue->subscribers);
+      $queue->subscribers = $queue->getSubscribers();
       foreach(array_chunk($queue->subscribers['to_process'], self::BATCH_SIZE)
               as $subscribers_to_process_ids
       ) {
@@ -163,7 +163,7 @@ class SendingQueue {
     return SendingQueueModel::orderByDesc('priority')
       ->whereNull('deleted_at')
       ->whereNull('status')
-      ->findResultSet();
+      ->findMany();
   }
 
   function updateQueue($queue) {
@@ -183,10 +183,6 @@ class SendingQueue {
         $newsletter->setStatus(NewsletterModel::STATUS_SENT);
       }
     }
-    $subscribers = $queue->subscribers;
-    $queue->subscribers = serialize((array) $subscribers);
-    $queue->save();
-    $queue->subscribers = $subscribers;
-    return $queue;
+    return $queue->save();
   }
 }
\ No newline at end of file
diff --git a/lib/Cron/Workers/SendingQueue/Tasks/Subscribers.php b/lib/Cron/Workers/SendingQueue/Tasks/Subscribers.php
index baa5488eec..76f010aa5e 100644
--- a/lib/Cron/Workers/SendingQueue/Tasks/Subscribers.php
+++ b/lib/Cron/Workers/SendingQueue/Tasks/Subscribers.php
@@ -4,17 +4,6 @@ namespace MailPoet\Cron\Workers\SendingQueue\Tasks;
 if(!defined('ABSPATH')) exit;
 
 class Subscribers {
-  static function get($subscribers) {
-    $subscribers = unserialize($subscribers);
-    if(empty($subscribers['processed'])) {
-      $subscribers['processed'] = array();
-    }
-    if(empty($subscribers['failed'])) {
-      $subscribers['failed'] = array();
-    }
-    return $subscribers;
-  }
-
   static function updateToProcessList(
     array $found_subscribers_ids,
     array $subscribers_to_process_ids,
diff --git a/lib/Models/SendingQueue.php b/lib/Models/SendingQueue.php
index 1e479d16e8..c900480f01 100644
--- a/lib/Models/SendingQueue.php
+++ b/lib/Models/SendingQueue.php
@@ -39,4 +39,35 @@ class SendingQueue extends Model {
     $this->save();
     return ($this->getErrors() === false && $this->id() > 0);
   }
+
+  function save() {
+    if(!is_serialized($this->subscribers)) {
+      $this->set('subscribers', serialize($this->subscribers));
+    }
+    parent::save();
+    $this->subscribers = $this->getSubscribers();
+    return $this;
+  }
+
+  function getSubscribers() {
+    if(!is_serialized($this->subscribers)) {
+      return $this->subscribers;
+    }
+    $subscribers = unserialize($this->subscribers);
+    if(empty($subscribers['processed'])) {
+      $subscribers['processed'] = array();
+    }
+    if(empty($subscribers['failed'])) {
+      $subscribers['failed'] = array();
+    }
+    return $subscribers;
+  }
+
+  function asArray() {
+    $model = parent::asArray();
+    $model['subscribers'] = (is_serialized($this->subscribers))
+      ? unserialize($this->subscribers)
+      : $this->subscribers;
+    return $model;
+  }
 }
\ No newline at end of file