diff --git a/lib/Db/AppointmentConfig.php b/lib/Db/AppointmentConfig.php
index 2bdd4778f..b2a72cb8b 100644
--- a/lib/Db/AppointmentConfig.php
+++ b/lib/Db/AppointmentConfig.php
@@ -11,6 +11,7 @@
 
 use JsonSerializable;
 use OCP\AppFramework\Db\Entity;
+use OCP\DB\Types;
 use ReturnTypeWillChange;
 use function json_decode;
 use function json_encode;
@@ -122,16 +123,16 @@ class AppointmentConfig extends Entity implements JsonSerializable {
 	public const VISIBILITY_PRIVATE = 'PRIVATE';
 
 	public function __construct() {
-		$this->addType('start', 'int');
-		$this->addType('end', 'int');
-		$this->addType('length', 'int');
-		$this->addType('increment', 'int');
-		$this->addType('preparationDuration', 'int');
-		$this->addType('followupDuration', 'int');
-		$this->addType('timeBeforeNextSlot', 'int');
-		$this->addType('dailyMax', 'int');
-		$this->addType('futureLimit', 'int');
-		$this->addType('createTalkRoom', 'boolean');
+		$this->addType('start', Types::INTEGER);
+		$this->addType('end', Types::INTEGER);
+		$this->addType('length', Types::INTEGER);
+		$this->addType('increment', Types::INTEGER);
+		$this->addType('preparationDuration', Types::INTEGER);
+		$this->addType('followupDuration', Types::INTEGER);
+		$this->addType('timeBeforeNextSlot', Types::INTEGER);
+		$this->addType('dailyMax', Types::INTEGER);
+		$this->addType('futureLimit', Types::INTEGER);
+		$this->addType('createTalkRoom', Types::BOOLEAN);
 	}
 
 	/**
diff --git a/lib/Db/Booking.php b/lib/Db/Booking.php
index d3bfe6dd0..54c92cd22 100644
--- a/lib/Db/Booking.php
+++ b/lib/Db/Booking.php
@@ -9,6 +9,7 @@
 
 use JsonSerializable;
 use OCP\AppFramework\Db\Entity;
+use OCP\DB\Types;
 use ReturnTypeWillChange;
 
 /**
@@ -74,12 +75,12 @@ class Booking extends Entity implements JsonSerializable {
 	private $talkUrl;
 
 	public function __construct() {
-		$this->addType('id', 'integer');
-		$this->addType('apptConfigId', 'integer');
-		$this->addType('createdAt', 'integer');
-		$this->addType('start', 'integer');
-		$this->addType('end', 'integer');
-		$this->addType('confirmed', 'boolean');
+		$this->addType('id', Types::INTEGER);
+		$this->addType('apptConfigId', Types::INTEGER);
+		$this->addType('createdAt', Types::INTEGER);
+		$this->addType('start', Types::INTEGER);
+		$this->addType('end', Types::INTEGER);
+		$this->addType('confirmed', Types::BOOLEAN);
 	}
 
 	#[ReturnTypeWillChange]