diff --git a/lib/API/Endpoints/Newsletters.php b/lib/API/Endpoints/Newsletters.php
index c7aa28ef75..ee8d302c86 100644
--- a/lib/API/Endpoints/Newsletters.php
+++ b/lib/API/Endpoints/Newsletters.php
@@ -4,6 +4,7 @@ namespace MailPoet\API\Endpoints;
 use MailPoet\API\Endpoint as APIEndpoint;
 use MailPoet\API\Error as APIError;
 use MailPoet\Listing;
+use MailPoet\Models\SendingQueue;
 use MailPoet\Models\Setting;
 use MailPoet\Models\Newsletter;
 use MailPoet\Models\NewsletterTemplate;
@@ -75,6 +76,7 @@ class Newsletters extends APIEndpoint {
           $newsletter->type
         )->findMany();
 
+        // update newsletter options
         foreach($option_fields as $option_field) {
           if(isset($options[$option_field->name])) {
             $newsletter_option = NewsletterOption::createOrUpdate(
@@ -86,13 +88,23 @@ class Newsletters extends APIEndpoint {
             );
           }
         }
-      }
 
-      $newsletter = Newsletter::filter('filterWithOptions')->findOne($newsletter->id);
+        // reload newsletter with updated options
+        $newsletter = Newsletter::filter('filterWithOptions')
+          ->findOne($newsletter->id);
 
-      // if this is a post notification, process options and update its schedule
-      if($newsletter->type === Newsletter::TYPE_NOTIFICATION) {
-        Scheduler::processPostNotificationSchedule($newsletter);
+        // if this is a post notification, process newsletter options and update its schedule
+        if($newsletter->type === Newsletter::TYPE_NOTIFICATION) {
+          // generate the new schedule from options and get the new "next run" date
+          $newsletter->schedule = Scheduler::processPostNotificationSchedule($newsletter);
+          $next_run_date = Scheduler::getNextRunDate($newsletter->schedule);
+          // find previously scheduled jobs and reschedule them using the new "next run" date
+          SendingQueue::where('newsletter_id', $newsletter->id)
+            ->where('status', SendingQueue::STATUS_SCHEDULED)
+            ->findResultSet()
+            ->set('scheduled_at', $next_run_date)
+            ->save();
+        }
       }
 
       return $this->successResponse($newsletter->asArray());
@@ -433,4 +445,4 @@ class Newsletters extends APIEndpoint {
       );
     }
   }
-}
+}
\ No newline at end of file
diff --git a/lib/Newsletter/Scheduler/Scheduler.php b/lib/Newsletter/Scheduler/Scheduler.php
index c10a7f4db3..3fe0381106 100644
--- a/lib/Newsletter/Scheduler/Scheduler.php
+++ b/lib/Newsletter/Scheduler/Scheduler.php
@@ -157,6 +157,7 @@ class Scheduler {
     }
     $relation->value = $schedule;
     $relation->save();
+    return $relation->value;
   }
 
   static function getNextRunDate($schedule) {
diff --git a/tests/unit/API/Endpoints/NewslettersTest.php b/tests/unit/API/Endpoints/NewslettersTest.php
index abf9f260c4..2ab9e11c17 100644
--- a/tests/unit/API/Endpoints/NewslettersTest.php
+++ b/tests/unit/API/Endpoints/NewslettersTest.php
@@ -1,4 +1,5 @@
 <?php
+use Carbon\Carbon;
 use Codeception\Util\Fixtures;
 use Codeception\Util\Stub;
 use MailPoet\API\Endpoints\Newsletters;
@@ -7,6 +8,7 @@ use MailPoet\Models\Newsletter;
 use MailPoet\Models\NewsletterOptionField;
 use MailPoet\Models\NewsletterSegment;
 use MailPoet\Models\Segment;
+use MailPoet\Models\SendingQueue;
 use MailPoet\Newsletter\Scheduler\Scheduler;
 use MailPoet\Newsletter\Url;
 use MailPoet\Router\Router;
@@ -142,6 +144,61 @@ class NewslettersTest extends MailPoetTest {
     expect($saved_newsletter->schedule)->equals('* * * * *');
   }
 
+  function testItCanReschedulePreviouslyScheduledSendingQueueJobs() {
+    // create newsletter options
+    $newsletter_options = array(
+      'intervalType',
+      'timeOfDay',
+      'weekDay',
+      'monthDay',
+      'nthWeekDay',
+      'schedule'
+    );
+    foreach($newsletter_options as $option) {
+      $newsletter_option_field = NewsletterOptionField::create();
+      $newsletter_option_field->name = $option;
+      $newsletter_option_field->newsletter_type = Newsletter::TYPE_NOTIFICATION;
+      $newsletter_option_field->save();
+    }
+
+    // create sending queues
+    $current_time = Carbon::now();
+    $sending_queue_1 = SendingQueue::create();
+    $sending_queue_1->newsletter_id = 1;
+    $sending_queue_1->status = SendingQueue::STATUS_SCHEDULED;
+    $sending_queue_1->scheduled_at = $current_time;
+    $sending_queue_1->save();
+
+    $sending_queue_2 = SendingQueue::create();
+    $sending_queue_2->newsletter_id = 1;
+    $sending_queue_2->save();
+
+    // save newsletter via router
+    $router = new Newsletters();
+    $newsletter_data = array(
+      'id' => 1,
+      'type' => Newsletter::TYPE_NOTIFICATION,
+      'subject' => 'Newsletter',
+      'options' => array(
+        // weekly on Monday @ 7am
+        'intervalType' => Scheduler::INTERVAL_WEEKLY,
+        'timeOfDay' => '25200',
+        'weekDay' => '1',
+        'monthDay' => '0',
+        'nthWeekDay' => '1',
+        'schedule' => '0 7 * * 1'
+      )
+    );
+    $newsletter = $router->save($newsletter_data);
+    $sending_queue_1 = SendingQueue::findOne($sending_queue_1->id);
+    $sending_queue_2 = SendingQueue::findOne($sending_queue_2->id);
+    expect($sending_queue_1->scheduled_at)->notEquals($current_time);
+    expect($sending_queue_1->scheduled_at)->equals(
+      Scheduler::getNextRunDate($newsletter->data['schedule'])
+    );
+    expect($sending_queue_2->scheduled_at)->null();
+  }
+
   function testItCanModifySegmentsOfExistingNewsletter() {
     $segment_1 = Segment::createOrUpdate(array('name' => 'Segment 1'));
     $fake_segment_id = 1;
@@ -557,9 +614,10 @@ class NewslettersTest extends MailPoetTest {
   }
 
   function _after() {
-    Newsletter::deleteMany();
-    NewsletterSegment::deleteMany();
-    NewsletterOptionField::deleteMany();
-    Segment::deleteMany();
+    ORM::raw_execute('TRUNCATE ' . Newsletter::$_table);
+    ORM::raw_execute('TRUNCATE ' . NewsletterSegment::$_table);
+    ORM::raw_execute('TRUNCATE ' . NewsletterOptionField::$_table);
+    ORM::raw_execute('TRUNCATE ' . Segment::$_table);
+    ORM::raw_execute('TRUNCATE ' . SendingQueue::$_table);
   }
 }