diff --git a/features/promotion/managing_promotions/editing_promotion.feature b/features/promotion/managing_promotions/editing_promotion.feature
index d09c42bb71..6ca86484ed 100644
--- a/features/promotion/managing_promotions/editing_promotion.feature
+++ b/features/promotion/managing_promotions/editing_promotion.feature
@@ -6,7 +6,8 @@ Feature: Editing promotion
 
     Background:
         Given the store operates on a single channel in "United States"
-        And there is a promotion "Christmas sale"
+        And there is a promotion "Christmas sale" with priority 0
+        And there is a promotion "Holiday sale" with priority 1
         And I am logged in as an administrator
 
     @ui
@@ -59,3 +60,11 @@ Feature: Editing promotion
         Given this promotion gives "$10.00" discount to every order
         When the store also operates on another channel named "EU-WEB"
         Then I should be able to modify a "Christmas sale" promotion
+
+    @ui
+    Scenario: Remove priority from existing promotion
+        Given I want to modify a "Christmas sale" promotion
+        When I remove its priority
+        And I save my changes
+        Then I should be notified that it has been successfully edited
+        And the "Christmas sale" promotion should have priority 1
diff --git a/src/Sylius/Behat/Context/Ui/Admin/ManagingPromotionsContext.php b/src/Sylius/Behat/Context/Ui/Admin/ManagingPromotionsContext.php
index bab54a1b41..b93abc38ae 100644
--- a/src/Sylius/Behat/Context/Ui/Admin/ManagingPromotionsContext.php
+++ b/src/Sylius/Behat/Context/Ui/Admin/ManagingPromotionsContext.php
@@ -117,6 +117,14 @@ final class ManagingPromotionsContext implements Context
         $this->createPage->nameIt($name);
     }
 
+    /**
+     * @When I remove its priority
+     */
+    public function iRemoveItsPriority()
+    {
+        $this->updatePage->setPriority(null);
+    }
+
     /**
      * @Then the :promotionName promotion should appear in the registry
      * @Then the :promotionName promotion should exist in the registry
@@ -603,6 +611,16 @@ final class ManagingPromotionsContext implements Context
         );
     }
 
+    /**
+     * @Given the :promotion promotion should have priority :priority
+     */
+    public function thePromotionsShouldHavePriority(PromotionInterface $promotion, $priority)
+    {
+        $this->iWantToModifyAPromotion($promotion);
+
+        Assert::same($this->updatePage->getPriority(), $priority);
+    }
+
     /**
      * @param string $element
      * @param string $expectedMessage
diff --git a/src/Sylius/Behat/Page/Admin/Promotion/UpdatePage.php b/src/Sylius/Behat/Page/Admin/Promotion/UpdatePage.php
index ada403606d..437ab94ef1 100644
--- a/src/Sylius/Behat/Page/Admin/Promotion/UpdatePage.php
+++ b/src/Sylius/Behat/Page/Admin/Promotion/UpdatePage.php
@@ -24,6 +24,22 @@ class UpdatePage extends BaseUpdatePage implements UpdatePageInterface
     use NamesIt;
     use ChecksCodeImmutability;
 
+    /**
+     * {@inheritdoc}
+     */
+    public function setPriority($priority)
+    {
+        $this->getDocument()->fillField('Priority', $priority);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return $this->getElement('priority')->getValue();
+    }
+
     /**
      * {@inheritdoc}
      */
@@ -116,6 +132,7 @@ class UpdatePage extends BaseUpdatePage implements UpdatePageInterface
     {
         return [
             'code' => '#sylius_promotion_code',
+            'priority' => '#sylius_promotion_priority',
             'coupon_based' => '#sylius_promotion_couponBased',
             'ends_at' => '#sylius_promotion_endsAt',
             'ends_at_date' => '#sylius_promotion_endsAt_date',
diff --git a/src/Sylius/Behat/Page/Admin/Promotion/UpdatePageInterface.php b/src/Sylius/Behat/Page/Admin/Promotion/UpdatePageInterface.php
index f471706d1d..1a9f3ff227 100644
--- a/src/Sylius/Behat/Page/Admin/Promotion/UpdatePageInterface.php
+++ b/src/Sylius/Behat/Page/Admin/Promotion/UpdatePageInterface.php
@@ -19,6 +19,17 @@ use Sylius\Behat\Page\Admin\Crud\UpdatePageInterface as BaseUpdatePageInterface;
  */
 interface UpdatePageInterface extends BaseUpdatePageInterface
 {
+
+    /**
+     * @param int|null $priority
+     */
+    public function setPriority($priority);
+
+    /**
+     * @return int
+     */
+    public function getPriority();
+
     /**
      * @param string $name
      */
diff --git a/src/Sylius/Bundle/PromotionBundle/Form/Type/PromotionType.php b/src/Sylius/Bundle/PromotionBundle/Form/Type/PromotionType.php
index 24ab525b4a..14d4d15ee4 100644
--- a/src/Sylius/Bundle/PromotionBundle/Form/Type/PromotionType.php
+++ b/src/Sylius/Bundle/PromotionBundle/Form/Type/PromotionType.php
@@ -11,6 +11,7 @@
 
 namespace Sylius\Bundle\PromotionBundle\Form\Type;
 
+use Sylius\Bundle\PromotionBundle\Form\EventListener\SetPriorityFormSubscriber;
 use Sylius\Bundle\ResourceBundle\Form\EventSubscriber\AddCodeFormSubscriber;
 use Sylius\Bundle\ResourceBundle\Form\Type\AbstractResourceType;
 use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
diff --git a/src/Sylius/Component/Promotion/Model/Promotion.php b/src/Sylius/Component/Promotion/Model/Promotion.php
index c864ff99b6..ac52157272 100644
--- a/src/Sylius/Component/Promotion/Model/Promotion.php
+++ b/src/Sylius/Component/Promotion/Model/Promotion.php
@@ -174,7 +174,7 @@ class Promotion implements PromotionInterface
      */
     public function setPriority($priority)
     {
-        $this->priority = $priority;
+        $this->priority = null === $priority ? -1 : $priority;
     }
 
     /**