diff --git a/src/ContaoManager/Plugin.php b/src/ContaoManager/Plugin.php
index 2f7a31b..6991a36 100644
--- a/src/ContaoManager/Plugin.php
+++ b/src/ContaoManager/Plugin.php
@@ -15,7 +15,7 @@
 
 class Plugin implements BundlePluginInterface
 {
-    public function getBundles(ParserInterface $parser)
+    public function getBundles(ParserInterface $parser): array
     {
         return [
             (new BundleConfig(Terminal42ChangeLanguageBundle::class))