diff --git a/mailpoet/lib/Cron/Workers/SubscriberLinkTokens.php b/mailpoet/lib/Cron/Workers/SubscriberLinkTokens.php
index d98cc4ada4..46d9804d29 100644
--- a/mailpoet/lib/Cron/Workers/SubscriberLinkTokens.php
+++ b/mailpoet/lib/Cron/Workers/SubscriberLinkTokens.php
@@ -8,6 +8,7 @@ use MailPoet\Entities\SubscriberEntity;
 use MailPoet\Subscribers\SubscribersRepository;
 use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Carbon\Carbon;
+use MailPoetVendor\Doctrine\DBAL\ParameterType;
 use MailPoetVendor\Doctrine\ORM\EntityManager;
 
 if (!defined('ABSPATH')) exit;
@@ -31,7 +32,7 @@ class SubscriberLinkTokens extends SimpleWorker {
       $connection->executeStatement(
         "UPDATE {$subscribersTable} SET link_token = SUBSTRING(MD5(CONCAT(:authKey, email)), 1, :tokenLength) WHERE link_token IS NULL LIMIT :limit",
         ['authKey' => $authKey, 'tokenLength' => SubscriberEntity::OBSOLETE_LINK_TOKEN_LENGTH, 'limit' => self::BATCH_SIZE],
-        ['authKey' => \PDO::PARAM_STR, 'tokenLength' => \PDO::PARAM_INT, 'limit' => \PDO::PARAM_INT]
+        ['authKey' => ParameterType::STRING, 'tokenLength' => ParameterType::INTEGER, 'limit' => ParameterType::INTEGER]
       );
 
       $this->schedule();
diff --git a/mailpoet/lib/Doctrine/Types/BigIntType.php b/mailpoet/lib/Doctrine/Types/BigIntType.php
index c461dc6165..a1f08d85e8 100644
--- a/mailpoet/lib/Doctrine/Types/BigIntType.php
+++ b/mailpoet/lib/Doctrine/Types/BigIntType.php
@@ -2,9 +2,9 @@
 
 namespace MailPoet\Doctrine\Types;
 
+use MailPoetVendor\Doctrine\DBAL\ParameterType;
 use MailPoetVendor\Doctrine\DBAL\Platforms\AbstractPlatform;
 use MailPoetVendor\Doctrine\DBAL\Types\BigIntType as DoctrineBigIntType;
-use PDO;
 
 class BigIntType extends DoctrineBigIntType {
   // override Doctrine's bigint type that historically maps DB's "bigint" to PHP's "string"
@@ -12,7 +12,7 @@ class BigIntType extends DoctrineBigIntType {
   const NAME = 'bigint';
 
   public function getBindingType() {
-    return PDO::PARAM_INT;
+    return ParameterType::INTEGER;
   }
 
   public function convertToPHPValue($value, AbstractPlatform $platform) {
diff --git a/mailpoet/lib/Logging/LogRepository.php b/mailpoet/lib/Logging/LogRepository.php
index 9031918487..c94b5ab344 100644
--- a/mailpoet/lib/Logging/LogRepository.php
+++ b/mailpoet/lib/Logging/LogRepository.php
@@ -9,6 +9,7 @@ use MailPoet\InvalidStateException;
 use MailPoet\Util\Helpers;
 use MailPoet\WP\Functions;
 use MailPoetVendor\Carbon\Carbon;
+use MailPoetVendor\Doctrine\DBAL\ParameterType;
 use MailPoetVendor\Doctrine\ORM\EntityManager;
 
 /**
@@ -115,8 +116,8 @@ class LogRepository extends Repository {
       'limit' => $limit,
       ],
       [
-      'date' => \PDO::PARAM_STR,
-      'limit' => \PDO::PARAM_INT,
+      'date' => ParameterType::STRING,
+      'limit' => ParameterType::INTEGER,
       ]
     );
   }
diff --git a/mailpoet/lib/Segments/SegmentsRepository.php b/mailpoet/lib/Segments/SegmentsRepository.php
index 86415f4b38..d14974fa88 100644
--- a/mailpoet/lib/Segments/SegmentsRepository.php
+++ b/mailpoet/lib/Segments/SegmentsRepository.php
@@ -18,6 +18,7 @@ use MailPoet\NotFoundException;
 use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Carbon\Carbon;
 use MailPoetVendor\Doctrine\DBAL\Connection;
+use MailPoetVendor\Doctrine\DBAL\ParameterType;
 use MailPoetVendor\Doctrine\ORM\EntityManager;
 use MailPoetVendor\Doctrine\ORM\ORMException;
 
@@ -267,7 +268,7 @@ class SegmentsRepository extends Repository {
         ->where('s.id IN (:ids)')
         ->andWhere('s.type = :type')
         ->setParameter('ids', $ids, Connection::PARAM_INT_ARRAY)
-        ->setParameter('type', $type, \PDO::PARAM_STR)
+        ->setParameter('type', $type, ParameterType::STRING)
         ->getQuery()->execute();
 
       $queryBuilder = $entityManager->createQueryBuilder();
diff --git a/mailpoet/lib/Segments/WooCommerce.php b/mailpoet/lib/Segments/WooCommerce.php
index 1e51c51c8e..28c784ed4c 100644
--- a/mailpoet/lib/Segments/WooCommerce.php
+++ b/mailpoet/lib/Segments/WooCommerce.php
@@ -17,6 +17,7 @@ use MailPoet\WooCommerce\Subscription;
 use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Carbon\Carbon;
 use MailPoetVendor\Doctrine\DBAL\Connection;
+use MailPoetVendor\Doctrine\DBAL\ParameterType;
 use MailPoetVendor\Doctrine\ORM\EntityManager;
 
 class WooCommerce {
@@ -287,8 +288,8 @@ class WooCommerce {
       'highestOrderId' => $lastProcessedOrderId + $batchSize,
     ];
     $parametersType = [
-      'lowestOrderId' => \PDO::PARAM_INT,
-      'highestOrderId' => \PDO::PARAM_INT,
+      'lowestOrderId' => ParameterType::INTEGER,
+      'highestOrderId' => ParameterType::INTEGER,
     ];
 
     if ($this->woocommerceHelper->isWooCommerceCustomOrdersTableEnabled()) {
@@ -441,7 +442,7 @@ class WooCommerce {
       WHERE is_woocommerce_user = 1
     ",
       ['segmentId' => $wcSegment->getId()],
-      ['segmentId' => \PDO::PARAM_INT]
+      ['segmentId' => ParameterType::INTEGER]
     );
   }
 
@@ -457,7 +458,7 @@ class WooCommerce {
       WHERE mpss.segment_id = :segmentId AND (mps.is_woocommerce_user = 0 OR mps.email = '' OR mps.email IS NULL)
     ",
       ['segmentId' => $wcSegment->getId()],
-      ['segmentId' => \PDO::PARAM_INT]
+      ['segmentId' => ParameterType::INTEGER]
     );
   }
 
@@ -475,7 +476,7 @@ class WooCommerce {
         AND mps.is_woocommerce_user = 1
     ",
       ['statusUnsubscribed' => SubscriberEntity::STATUS_UNSUBSCRIBED],
-      ['statusUnsubscribed' => \PDO::PARAM_STR]
+      ['statusUnsubscribed' => ParameterType::INTEGER]
     );
     // SET global status unsubscribed to all woocommerce users who have only 1 segment and it is woocommerce segment and they are not subscribed
     // You can't specify target table 'mps' for update in FROM clause
@@ -493,7 +494,7 @@ class WooCommerce {
       )
     ",
       ['statusUnsubscribed' => SubscriberEntity::STATUS_UNSUBSCRIBED, 'segmentId' => $wcSegment->getId()],
-      ['statusUnsubscribed' => \PDO::PARAM_STR, 'segmentId' => \PDO::PARAM_INT]
+      ['statusUnsubscribed' => ParameterType::STRING, 'segmentId' => ParameterType::INTEGER]
     );
   }
 
@@ -620,7 +621,7 @@ class WooCommerce {
         AND mps.is_woocommerce_user = 1
     ",
       ['status' => $status, 'segmentId' => $wcSegment->getId()],
-      ['status' => \PDO::PARAM_STR, 'segmentId' => \PDO::PARAM_INT]
+      ['status' => ParameterType::STRING, 'segmentId' => ParameterType::INTEGER]
     );
   }
 }
diff --git a/mailpoet/lib/Subscribers/InactiveSubscribersController.php b/mailpoet/lib/Subscribers/InactiveSubscribersController.php
index cf5a51d3c4..940df80d7e 100644
--- a/mailpoet/lib/Subscribers/InactiveSubscribersController.php
+++ b/mailpoet/lib/Subscribers/InactiveSubscribersController.php
@@ -8,6 +8,7 @@ use MailPoet\Entities\SendingQueueEntity;
 use MailPoet\Entities\SubscriberEntity;
 use MailPoetVendor\Carbon\Carbon;
 use MailPoetVendor\Doctrine\DBAL\Connection;
+use MailPoetVendor\Doctrine\DBAL\ParameterType;
 use MailPoetVendor\Doctrine\ORM\EntityManager;
 
 class InactiveSubscribersController {
@@ -165,7 +166,7 @@ class InactiveSubscribersController {
       'thresholdDate' => $thresholdDate,
       'statusInactive' => SubscriberEntity::STATUS_INACTIVE,
       'batchSize' => $batchSize,
-    ], ['batchSize' => \PDO::PARAM_INT])->fetchAllAssociative();
+    ], ['batchSize' => ParameterType::INTEGER])->fetchAllAssociative();
 
     $idsToActivate = array_map(
       function($id) {
diff --git a/mailpoet/lib/Subscribers/SubscribersEmailCountsController.php b/mailpoet/lib/Subscribers/SubscribersEmailCountsController.php
index e17b20a200..3491a1c6fd 100644
--- a/mailpoet/lib/Subscribers/SubscribersEmailCountsController.php
+++ b/mailpoet/lib/Subscribers/SubscribersEmailCountsController.php
@@ -6,6 +6,7 @@ use MailPoet\Entities\ScheduledTaskEntity;
 use MailPoet\Entities\ScheduledTaskSubscriberEntity;
 use MailPoet\Entities\SubscriberEntity;
 use MailPoetVendor\Carbon\Carbon;
+use MailPoetVendor\Doctrine\DBAL\ParameterType;
 use MailPoetVendor\Doctrine\ORM\EntityManager;
 
 class SubscribersEmailCountsController {
@@ -122,8 +123,8 @@ class SubscribersEmailCountsController {
         'batchSize' => $batchSize,
       ],
       [
-        'startId' => \PDO::PARAM_INT,
-        'batchSize' => \PDO::PARAM_INT,
+        'startId' => ParameterType::INTEGER,
+        'batchSize' => ParameterType::INTEGER,
       ]
     );
 
diff --git a/mailpoet/lib/Subscribers/SubscribersRepository.php b/mailpoet/lib/Subscribers/SubscribersRepository.php
index ca7fe1f74e..2a49a73c18 100644
--- a/mailpoet/lib/Subscribers/SubscribersRepository.php
+++ b/mailpoet/lib/Subscribers/SubscribersRepository.php
@@ -18,6 +18,7 @@ use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Carbon\Carbon;
 use MailPoetVendor\Carbon\CarbonImmutable;
 use MailPoetVendor\Doctrine\DBAL\Connection;
+use MailPoetVendor\Doctrine\DBAL\ParameterType;
 use MailPoetVendor\Doctrine\ORM\EntityManager;
 use MailPoetVendor\Doctrine\ORM\Query\Expr\Join;
 
@@ -574,7 +575,7 @@ class SubscribersRepository extends Repository {
        LEFT JOIN {$wpdb->users} u ON s.wp_user_id = u.id
        WHERE ss.segment_id = :segmentId AND (u.id IS NULL OR s.email = '')",
       ['segmentId' => $segmentId],
-      ['segmentId' => \PDO::PARAM_INT]
+      ['segmentId' => ParameterType::INTEGER]
     );
   }
 
diff --git a/mailpoet/tests/_support/IntegrationTester.php b/mailpoet/tests/_support/IntegrationTester.php
index 8c92c73bf6..b81bb319ae 100644
--- a/mailpoet/tests/_support/IntegrationTester.php
+++ b/mailpoet/tests/_support/IntegrationTester.php
@@ -18,6 +18,7 @@ use MailPoet\Segments\DynamicSegments\Filters\Filter;
 use MailPoet\Util\Security;
 use MailPoet\WooCommerce\Helper;
 use MailPoetVendor\Carbon\Carbon;
+use MailPoetVendor\Doctrine\DBAL\ParameterType;
 use MailPoetVendor\Doctrine\DBAL\Query\QueryBuilder;
 use MailPoetVendor\Doctrine\DBAL\Result;
 use MailPoetVendor\Doctrine\ORM\EntityManager;
@@ -95,7 +96,7 @@ class IntegrationTester extends \Codeception\Actor {
     $this->entityManager->getConnection()->executeStatement(
       "DELETE FROM {$wpdb->users} WHERE id = :id",
       ['id' => $id],
-      ['id' => \PDO::PARAM_INT]
+      ['id' => ParameterType::INTEGER]
     );
   }
 
diff --git a/mailpoet/tests/integration/Segments/WPTest.php b/mailpoet/tests/integration/Segments/WPTest.php
index 2b1b89b107..ff228aec11 100644
--- a/mailpoet/tests/integration/Segments/WPTest.php
+++ b/mailpoet/tests/integration/Segments/WPTest.php
@@ -20,6 +20,7 @@ use MailPoet\WooCommerce\Helper;
 use MailPoet\WooCommerce\Subscription;
 use MailPoet\WP\Functions;
 use MailPoetVendor\Carbon\Carbon;
+use MailPoetVendor\Doctrine\DBAL\ParameterType;
 
 class WPTest extends \MailPoetTest {
   /** @var array<int> */
@@ -717,7 +718,7 @@ class WPTest extends \MailPoetTest {
     $this->entityManager->getConnection()->executeQuery(
       "UPDATE {$wpdb->users} SET user_email = :userEmail WHERE id = :id",
       ['userEmail' => $email, 'id' => $id],
-      [\PDO::PARAM_STR, \PDO::PARAM_INT]
+      [ParameterType::STRING, ParameterType::INTEGER]
     );
   }
 
@@ -727,7 +728,7 @@ class WPTest extends \MailPoetTest {
     $this->entityManager->getConnection()->executeQuery(
       "UPDATE {$wpdb->users} SET display_name = :displayName WHERE id = :id",
       ['displayName' => $name, 'id' => $id],
-      [\PDO::PARAM_STR, \PDO::PARAM_INT]
+      [ParameterType::STRING, ParameterType::INTEGER]
     );
   }