diff --git a/phpBB/phpbb/db/migration/data/v330/extensions_composer_2.php b/phpBB/phpbb/db/migration/data/v330/extensions_composer_2.php
index c6ea7f4c13..8199dc807e 100644
--- a/phpBB/phpbb/db/migration/data/v330/extensions_composer_2.php
+++ b/phpBB/phpbb/db/migration/data/v330/extensions_composer_2.php
@@ -17,7 +17,7 @@ class extensions_composer_2 extends \phpbb\db\migration\migration
 {
 	public function update_data()
 	{
-		$repositories = json_decode($this->config('exts_composer_repositories'), true);
+		$repositories = json_decode($this->config['exts_composer_repositories'], true);
 		$repositories[] = 'https://satis.phpbb.com';
 		$repositories = array_unique($repositories);