diff --git a/src/Resources/skeleton/doctrine/Fixtures.tpl.php b/src/Resources/skeleton/doctrine/Fixtures.tpl.php
index b0b52e42b..a77ecff77 100644
--- a/src/Resources/skeleton/doctrine/Fixtures.tpl.php
+++ b/src/Resources/skeleton/doctrine/Fixtures.tpl.php
@@ -7,7 +7,7 @@
 
 class <?= $class_name ?> extends Fixture
 {
-    public function load(ObjectManager $manager)
+    public function load(ObjectManager $manager): void
     {
         // $product = new Product();
         // $manager->persist($product);
diff --git a/src/Resources/skeleton/form/Type.tpl.php b/src/Resources/skeleton/form/Type.tpl.php
index 8d2e03399..9aea447dc 100644
--- a/src/Resources/skeleton/form/Type.tpl.php
+++ b/src/Resources/skeleton/form/Type.tpl.php
@@ -17,7 +17,7 @@
 
 class <?= $class_name ?> extends AbstractType
 {
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
 <?php foreach ($form_fields as $form_field => $typeOptions): ?>
@@ -34,7 +34,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
         ;
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
 <?php if ($bounded_full_class_name): ?>
diff --git a/src/Security/SecurityControllerBuilder.php b/src/Security/SecurityControllerBuilder.php
index 69410fe11..99be648fc 100644
--- a/src/Security/SecurityControllerBuilder.php
+++ b/src/Security/SecurityControllerBuilder.php
@@ -66,7 +66,7 @@ public function addLoginMethod(ClassSourceManipulator $manipulator): void
 
     public function addLogoutMethod(ClassSourceManipulator $manipulator): void
     {
-        $logoutMethodBuilder = $manipulator->createMethodBuilder('logout', null, false, ['@Route("/logout", name="app_logout")']);
+        $logoutMethodBuilder = $manipulator->createMethodBuilder('logout', 'void', false, ['@Route("/logout", name="app_logout")']);
 
         $manipulator->addUseStatementIfNecessary(Route::class);
         $manipulator->addMethodBody($logoutMethodBuilder, <<<'CODE'
diff --git a/tests/Security/fixtures/expected/SecurityController_login_logout.php b/tests/Security/fixtures/expected/SecurityController_login_logout.php
index ed5a595b7..65c096f8f 100644
--- a/tests/Security/fixtures/expected/SecurityController_login_logout.php
+++ b/tests/Security/fixtures/expected/SecurityController_login_logout.php
@@ -29,7 +29,7 @@ public function login(AuthenticationUtils $authenticationUtils): Response
     /**
      * @Route("/logout", name="app_logout")
      */
-    public function logout()
+    public function logout(): void
     {
         throw new \LogicException('This method can be blank - it will be intercepted by the logout key on your firewall.');
     }
diff --git a/tests/Security/fixtures/expected/SecurityController_logout.php b/tests/Security/fixtures/expected/SecurityController_logout.php
index 8efa75143..037a1539b 100644
--- a/tests/Security/fixtures/expected/SecurityController_logout.php
+++ b/tests/Security/fixtures/expected/SecurityController_logout.php
@@ -10,7 +10,7 @@ class SecurityController extends AbstractController
     /**
      * @Route("/logout", name="app_logout")
      */
-    public function logout()
+    public function logout(): void
     {
         throw new \LogicException('This method can be blank - it will be intercepted by the logout key on your firewall.');
     }