diff --git a/src/Settings/YamlSettings.php b/src/Settings/YamlSettings.php
index 3c0d2b288..d136613d2 100644
--- a/src/Settings/YamlSettings.php
+++ b/src/Settings/YamlSettings.php
@@ -25,6 +25,6 @@ public static function fromFile($filename)
      */
     public function save($filename)
     {
-        file_put_contents($filename, Yaml::dump($this->attributes));
+        file_put_contents($filename, Yaml::dump($this->attributes, 3));
     }
 }