diff --git a/lib/Db/TreeMapper.php b/lib/Db/TreeMapper.php
index 99784493..faacdabc 100644
--- a/lib/Db/TreeMapper.php
+++ b/lib/Db/TreeMapper.php
@@ -7,7 +7,6 @@
 
 namespace OCA\Bookmarks\Db;
 
-use Doctrine\DBAL\Types\Type;
 use OCA\Bookmarks\Events\BeforeDeleteEvent;
 use OCA\Bookmarks\Events\MoveEvent;
 use OCA\Bookmarks\Events\UpdateEvent;
diff --git a/lib/Db/Types.php b/lib/Db/Types.php
new file mode 100644
index 00000000..d1cc4111
--- /dev/null
+++ b/lib/Db/Types.php
@@ -0,0 +1,110 @@
+<?php
+/*
+ * @copyright 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @author 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace OCA\Bookmarks\Db;
+
+/**
+ * Database types supported by Nextcloud's DBs
+ *
+ * Use these constants instead of \Doctrine\DBAL\Types\Type or \Doctrine\DBAL\Types\Types
+ *
+ * FIXME: Remove this as soon as min nc version is 21
+ */
+final class Types {
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const BIGINT = 'bigint';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const BINARY = 'binary';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const BLOB = 'blob';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const BOOLEAN = 'boolean';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const DATE = 'date';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const DATETIME = 'datetime';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const DECIMAL = 'decimal';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const FLOAT = 'float';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const INTEGER = 'integer';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const SMALLINT = 'smallint';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const STRING = 'string';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const TEXT = 'text';
+
+	/**
+	 * @var string
+	 * @since 21.0.0
+	 */
+	public const TIME = 'time';
+}
diff --git a/lib/Migration/Version003000009Date20200505094721.php b/lib/Migration/Version003000009Date20200505094721.php
index 7e94ff92..a8ac9b64 100644
--- a/lib/Migration/Version003000009Date20200505094721.php
+++ b/lib/Migration/Version003000009Date20200505094721.php
@@ -9,7 +9,7 @@ namespace OCA\Bookmarks\Migration;
 
 use Closure;
 use Doctrine\DBAL\Schema\SchemaException;
-use Doctrine\DBAL\Types\Type;
+use OCA\Bookmarks\Db\Types;
 use OCP\DB\ISchemaWrapper;
 use OCP\IDBConnection;
 use OCP\Migration\IOutput;
@@ -49,7 +49,7 @@ class Version003000009Date20200505094721 extends SimpleMigrationStep {
 		$schema = $schemaClosure();
 		$table = $schema->getTable('bookmarks_tree');
 		$table->changeColumn('index', [
-			'type' => Type::getType('bigint'),
+			'type' => Types::BIGINT,
 			'unsigned' => true,
 		]);
 		return $schema;
diff --git a/lib/Migration/Version003004000Date20200807124721.php b/lib/Migration/Version003004000Date20200807124721.php
index a2dc08d5..75703179 100644
--- a/lib/Migration/Version003004000Date20200807124721.php
+++ b/lib/Migration/Version003004000Date20200807124721.php
@@ -9,7 +9,7 @@ namespace OCA\Bookmarks\Migration;
 
 use Closure;
 use Doctrine\DBAL\Schema\SchemaException;
-use Doctrine\DBAL\Types\Type;
+use OCA\Bookmarks\Db\Types;
 use OCP\DB\ISchemaWrapper;
 use OCP\IDBConnection;
 use OCP\Migration\IOutput;
@@ -49,7 +49,7 @@ class Version003004000Date20200807124721 extends SimpleMigrationStep {
 		$schema = $schemaClosure();
 		if ($schema->hasTable('bookmarks')) {
 			$table = $schema->getTable('bookmarks');
-			$table->addColumn('available', Type::BOOLEAN, [
+			$table->addColumn('available', Types::BOOLEAN, [
 				'notnull' => true,
 				'default' => true,
 			]);
diff --git a/lib/Migration/Version003004000Date20200817124721.php b/lib/Migration/Version003004000Date20200817124721.php
index 30db9d81..4d860320 100644
--- a/lib/Migration/Version003004000Date20200817124721.php
+++ b/lib/Migration/Version003004000Date20200817124721.php
@@ -9,7 +9,7 @@ namespace OCA\Bookmarks\Migration;
 
 use Closure;
 use Doctrine\DBAL\Schema\SchemaException;
-use Doctrine\DBAL\Types\Type;
+use OCA\Bookmarks\Db\Types;
 use OCP\DB\ISchemaWrapper;
 use OCP\IDBConnection;
 use OCP\Migration\IOutput;
@@ -49,7 +49,7 @@ class Version003004000Date20200817124721 extends SimpleMigrationStep {
 		$schema = $schemaClosure();
 		if ($schema->hasTable('bookmarks')) {
 			$table = $schema->getTable('bookmarks');
-			$table->addColumn('archived_file', Type::BIGINT, [
+			$table->addColumn('archived_file', Types::BIGINT, [
 				'notnull' => false,
 			]);
 		}
diff --git a/psalm.xml b/psalm.xml
index 0ff2508d..f083ece2 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -29,7 +29,6 @@
         <UndefinedClass>
             <errorLevel type="suppress">
                 <referencedClass name="OC" />
-                <referencedClass name="Doctrine\DBAL\Types\Type" />
             </errorLevel>
         </UndefinedClass>
         <UndefinedDocblockClass>