diff --git a/src/Controller/Frontend/EventFilterController.php b/src/Controller/Frontend/EventFilterController.php
index c0a4eed..7f62363 100644
--- a/src/Controller/Frontend/EventFilterController.php
+++ b/src/Controller/Frontend/EventFilterController.php
@@ -11,6 +11,7 @@ use Contao\ModuleModel;
 use Contao\StringUtil;
 use Doctrine\DBAL\ArrayParameterType;
 use Doctrine\DBAL\Connection;
+use Doctrine\DBAL\ParameterType;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
@@ -55,7 +56,7 @@ class EventFilterController extends AbstractFrontendModuleController
                     ORDER BY e.startTime ASC
                 SQL,
                 [$today, $today],
-                [\PDO::PARAM_INT, \PDO::PARAM_INT],
+                [ParameterType::INTEGER, ParameterType::INTEGER],
             )->fetchFirstColumn();
         } else {
             $rows = $this->connection->executeQuery(
@@ -70,7 +71,7 @@ class EventFilterController extends AbstractFrontendModuleController
                     ORDER BY e.startTime ASC
                 SQL,
                 [$calendarIds, $today, $today],
-                [ArrayParameterType::INTEGER, \PDO::PARAM_INT, \PDO::PARAM_INT],
+                [ArrayParameterType::INTEGER, ParameterType::INTEGER, ParameterType::INTEGER],
             )->fetchFirstColumn();
         }