diff --git a/migrations/0.3.4.php b/migrations/0.3.4.php
deleted file mode 100644
index 4ce5dbe..0000000
--- a/migrations/0.3.4.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-/**
-*
-* @package mChat on Board3 Portal 0.3.4
-* @copyright (c) 2015 Board3 Group ( www.board3.de )
-* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
-*
-*/
-
-namespace dmzx\mchat\migrations;
-
-class 0.3.4 extends \phpbb\db\migration\migration
-{
-	static public function depends_on()
-	{
-		return array('\dmzx\mchat\migrations\install_mchat');
-	}
-
-	public function update_data()
-	{
-		return array(
-			array('config.add', array('mchat_on_portal', 1)),
-		);
-	}
-}