diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..b7dd1d2
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+- package-ecosystem: composer
+  directory: "/"
+  schedule:
+    interval: monthly
+  open-pull-requests-limit: 10
diff --git a/features/demo_app/src/DefaultKernel.php b/features/demo_app/src/DefaultKernel.php
index 9f56e13..e93b143 100644
--- a/features/demo_app/src/DefaultKernel.php
+++ b/features/demo_app/src/DefaultKernel.php
@@ -7,7 +7,7 @@
 
 class DefaultKernel extends AbstractKernel
 {
-    public function registerBundles()
+    public function registerBundles(): iterable
     {
         $contents = require $this->getProjectDir().'/'.$this->getConfigDirectory().'/bundles.php';
         foreach ($contents as $class => $envs) {
diff --git a/features/demo_app/src/KernelWithDocCreatedListener.php b/features/demo_app/src/KernelWithDocCreatedListener.php
index 551f24d..302d44a 100644
--- a/features/demo_app/src/KernelWithDocCreatedListener.php
+++ b/features/demo_app/src/KernelWithDocCreatedListener.php
@@ -7,7 +7,7 @@
 
 class KernelWithDocCreatedListener extends AbstractKernel
 {
-    public function registerBundles()
+    public function registerBundles(): iterable
     {
         $contents = require $this->getProjectDir().'/'.$this->getConfigDirectory().'/bundles.php';
         foreach ($contents as $class => $envs) {