diff --git a/public/install.php b/public/install.php
index 0b7df4c8..d7ef1973 100644
--- a/public/install.php
+++ b/public/install.php
@@ -93,7 +93,7 @@ if ($installOK && strtoupper($_SERVER['REQUEST_METHOD']) == 'POST') {
         unset($config['tmp']);
 
         $dumper = new \Symfony\Component\Yaml\Dumper();
-        $yaml = $dumper->dump($config);
+        $yaml = $dumper->dump($config, 5);
 
         file_put_contents(PHPCI_DIR . 'PHPCI/config.yml', $yaml);