diff --git a/Auto1ServiceAPIHandlerBundle.php b/Auto1ServiceAPIHandlerBundle.php
index 4461f70..8823f95 100644
--- a/Auto1ServiceAPIHandlerBundle.php
+++ b/Auto1ServiceAPIHandlerBundle.php
@@ -8,7 +8,7 @@
 
 class Auto1ServiceAPIHandlerBundle extends Bundle
 {
-    public function build(ContainerBuilder $container)
+    public function build(ContainerBuilder $container): void
     {
         parent::build($container);