diff --git a/src/ApixceptionBundle.php b/src/ApixceptionBundle.php
index 0c55f01..f3d4e70 100644
--- a/src/ApixceptionBundle.php
+++ b/src/ApixceptionBundle.php
@@ -8,7 +8,7 @@
 
 class ApixceptionBundle extends Bundle
 {
-    public function build(ContainerBuilder $container)
+    public function build(ContainerBuilder $container): void
     {
         parent::build($container);
     }