diff --git a/Command/BaseBootstrapSymlinkCommand.php b/Command/BaseBootstrapSymlinkCommand.php
index 22c6dcb1f..1bc62b350 100644
--- a/Command/BaseBootstrapSymlinkCommand.php
+++ b/Command/BaseBootstrapSymlinkCommand.php
@@ -136,7 +136,7 @@ public static function createMirror($symlinkTarget, $symlinkName)
     /**
      * {@inheritdoc}
      */
-    protected function configure()
+    protected function configure(): void
     {
         $this
             ->setDescription('Check and if possible install symlink to '.static::$targetSuffix)
diff --git a/Command/BootstrapSymlinkLessCommand.php b/Command/BootstrapSymlinkLessCommand.php
index 41f89411c..ed78dfba3 100644
--- a/Command/BootstrapSymlinkLessCommand.php
+++ b/Command/BootstrapSymlinkLessCommand.php
@@ -29,7 +29,7 @@ protected function getTwitterBootstrapName()
         return self::$twitterBootstrapName;
     }
 
-    protected function configure()
+    protected function configure(): void
     {
         parent::configure();
 
diff --git a/Command/BootstrapSymlinkSassCommand.php b/Command/BootstrapSymlinkSassCommand.php
index f993e0507..936903a6e 100644
--- a/Command/BootstrapSymlinkSassCommand.php
+++ b/Command/BootstrapSymlinkSassCommand.php
@@ -30,7 +30,7 @@ protected function getTwitterBootstrapName()
         return static::$twitterBootstrapName;
     }
 
-    protected function configure()
+    protected function configure(): void
     {
         parent::configure();
 
diff --git a/Command/InstallFontCommand.php b/Command/InstallFontCommand.php
index 72fa21fd2..9c5b62920 100644
--- a/Command/InstallFontCommand.php
+++ b/Command/InstallFontCommand.php
@@ -57,7 +57,7 @@ public function __construct(KernelInterface $kernel, $iconSet)
     /**
      * {@inheritdoc}
      */
-    protected function configure()
+    protected function configure(): void
     {
         $this
             ->setDescription('Install font to web/fonts')
diff --git a/DependencyInjection/Compiler/FormPass.php b/DependencyInjection/Compiler/FormPass.php
index 0357de3d5..23d0b9889 100644
--- a/DependencyInjection/Compiler/FormPass.php
+++ b/DependencyInjection/Compiler/FormPass.php
@@ -24,7 +24,7 @@ class FormPass implements CompilerPassInterface
     /**
      * {@inheritdoc}
      */
-    public function process(ContainerBuilder $container)
+    public function process(ContainerBuilder $container): void
     {
         if ($container->hasParameter('mopa_bootstrap.form.templating') && false !== ($template = $container->getParameter('mopa_bootstrap.form.templating'))) {
             $resources = $container->getParameter('twig.form.resources');
diff --git a/DependencyInjection/MopaBootstrapExtension.php b/DependencyInjection/MopaBootstrapExtension.php
index 82238e489..5c60b40e3 100644
--- a/DependencyInjection/MopaBootstrapExtension.php
+++ b/DependencyInjection/MopaBootstrapExtension.php
@@ -21,7 +21,7 @@ class MopaBootstrapExtension extends Extension
     /**
      * {@inheritdoc}
      */
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $configuration = new Configuration();
         $config = $this->processConfiguration($configuration, $configs);
@@ -105,7 +105,7 @@ public function load(array $configs, ContainerBuilder $container)
      *
      * @param string $prefix
      */
-    private function remapParameters(ContainerBuilder $container, $prefix, array $config)
+    private function remapParameters(ContainerBuilder $container, $prefix, array $config): void
     {
         foreach ($config as $key => $value) {
             $container->setParameter(\sprintf('%s.%s', $prefix, $key), $value);
diff --git a/Form/Extension/DateTypeExtension.php b/Form/Extension/DateTypeExtension.php
index 4f963d280..be5797a54 100644
--- a/Form/Extension/DateTypeExtension.php
+++ b/Form/Extension/DateTypeExtension.php
@@ -40,7 +40,7 @@ public function __construct(array $options)
     /**
      * {@inheritdoc}
      */
-    public function finishView(FormView $view, FormInterface $form, array $options)
+    public function finishView(FormView $view, FormInterface $form, array $options): void
     {
         if ('single_text' === $options['widget']) {
             if (isset($options['datepicker'])) {
@@ -57,7 +57,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefined([
             'datepicker',
diff --git a/Form/Extension/DatetimeTypeExtension.php b/Form/Extension/DatetimeTypeExtension.php
index 2c84b922c..a5bb092d8 100644
--- a/Form/Extension/DatetimeTypeExtension.php
+++ b/Form/Extension/DatetimeTypeExtension.php
@@ -27,7 +27,7 @@ class DatetimeTypeExtension extends AbstractTypeExtension
     /**
      * {@inheritdoc}
      */
-    public function finishView(FormView $view, FormInterface $form, array $options)
+    public function finishView(FormView $view, FormInterface $form, array $options): void
     {
         if ('single_text' === $options['widget']) {
             if (isset($options['datetimepicker'])) {
@@ -42,7 +42,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefined([
             'datetimepicker',
diff --git a/Form/Extension/EmbedFormExtension.php b/Form/Extension/EmbedFormExtension.php
index 3d23b09a7..a3de37328 100644
--- a/Form/Extension/EmbedFormExtension.php
+++ b/Form/Extension/EmbedFormExtension.php
@@ -27,7 +27,7 @@ class EmbedFormExtension extends AbstractTypeExtension
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'embed_form' => null,
@@ -37,7 +37,7 @@ public function configureOptions(OptionsResolver $resolver)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['embed_form'] = $options['embed_form'];
     }
diff --git a/Form/Extension/ErrorTypeFormTypeExtension.php b/Form/Extension/ErrorTypeFormTypeExtension.php
index bf05e2b4a..5bda7aa43 100644
--- a/Form/Extension/ErrorTypeFormTypeExtension.php
+++ b/Form/Extension/ErrorTypeFormTypeExtension.php
@@ -40,7 +40,7 @@ public function __construct(array $options)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['error_type'] = $options['error_type'];
         $view->vars['error_delay'] = $options['error_delay'];
@@ -49,7 +49,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'error_type' => $this->errorType,
diff --git a/Form/Extension/HelpFormTypeExtension.php b/Form/Extension/HelpFormTypeExtension.php
index fbb4f6eab..be1d5c040 100644
--- a/Form/Extension/HelpFormTypeExtension.php
+++ b/Form/Extension/HelpFormTypeExtension.php
@@ -41,7 +41,7 @@ public function __construct(array $options)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['help_block'] = $options['help_block'];
         $view->vars['help_label'] = $options['help_label'];
@@ -163,7 +163,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'help_block' => null,
diff --git a/Form/Extension/IconButtonExtension.php b/Form/Extension/IconButtonExtension.php
index a6248f1e2..565d3cfbf 100644
--- a/Form/Extension/IconButtonExtension.php
+++ b/Form/Extension/IconButtonExtension.php
@@ -27,7 +27,7 @@ class IconButtonExtension extends AbstractTypeExtension
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'icon' => null,
@@ -38,7 +38,7 @@ public function configureOptions(OptionsResolver $resolver)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['icon'] = $options['icon'];
         $view->vars['icon_inverted'] = $options['icon_inverted'];
diff --git a/Form/Extension/LayoutFormTypeExtension.php b/Form/Extension/LayoutFormTypeExtension.php
index a05def91f..511cbfa74 100644
--- a/Form/Extension/LayoutFormTypeExtension.php
+++ b/Form/Extension/LayoutFormTypeExtension.php
@@ -41,7 +41,7 @@ public function __construct(array $options)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $layout = $options['layout'];
 
@@ -63,7 +63,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
         ]);
     }
 
-    public function finishView(FormView $view, FormInterface $form, array $options)
+    public function finishView(FormView $view, FormInterface $form, array $options): void
     {
         if (!$view->parent && $options['compound'] && $view->vars['layout']) {
             $class = isset($view->vars['attr']['class']) ? $view->vars['attr']['class'].' ' : '';
@@ -74,7 +74,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'layout' => function (Options $options) {
diff --git a/Form/Extension/LegendFormTypeExtension.php b/Form/Extension/LegendFormTypeExtension.php
index bd7aa60a7..94a13d6aa 100644
--- a/Form/Extension/LegendFormTypeExtension.php
+++ b/Form/Extension/LegendFormTypeExtension.php
@@ -47,7 +47,7 @@ public function __construct(array $options)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['render_fieldset'] = $options['render_fieldset'];
         $view->vars['show_legend'] = $options['show_legend'];
@@ -61,7 +61,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'render_fieldset' => $this->renderFieldset,
diff --git a/Form/Extension/OffsetButtonExtension.php b/Form/Extension/OffsetButtonExtension.php
index afff93c66..9b32d76c3 100644
--- a/Form/Extension/OffsetButtonExtension.php
+++ b/Form/Extension/OffsetButtonExtension.php
@@ -27,7 +27,7 @@ class OffsetButtonExtension extends AbstractTypeExtension
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'button_offset' => null,
@@ -37,7 +37,7 @@ public function configureOptions(OptionsResolver $resolver)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['button_offset'] = $options['button_offset'];
     }
diff --git a/Form/Extension/StaticTextExtension.php b/Form/Extension/StaticTextExtension.php
index 7042a7fd0..7998a8af6 100644
--- a/Form/Extension/StaticTextExtension.php
+++ b/Form/Extension/StaticTextExtension.php
@@ -27,7 +27,7 @@ class StaticTextExtension extends AbstractTypeExtension
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'static_text' => null,
@@ -37,7 +37,7 @@ public function configureOptions(OptionsResolver $resolver)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['static_text'] = $options['static_text'];
         if ($options['static_text'] === true) {
diff --git a/Form/Extension/TabbedFormTypeExtension.php b/Form/Extension/TabbedFormTypeExtension.php
index 06e5a74ec..f2cb53f61 100644
--- a/Form/Extension/TabbedFormTypeExtension.php
+++ b/Form/Extension/TabbedFormTypeExtension.php
@@ -46,7 +46,7 @@ public function __construct(FormFactoryInterface $formFactory, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'tabs_class' => $this->options['class'],
@@ -56,7 +56,7 @@ public function configureOptions(OptionsResolver $resolver)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['tabbed'] = false;
     }
@@ -64,7 +64,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function finishView(FormView $view, FormInterface $form, array $options)
+    public function finishView(FormView $view, FormInterface $form, array $options): void
     {
         if (!$view->vars['tabbed']) {
             return;
diff --git a/Form/Extension/TimeTypeExtension.php b/Form/Extension/TimeTypeExtension.php
index b2a622d62..c6589cec4 100644
--- a/Form/Extension/TimeTypeExtension.php
+++ b/Form/Extension/TimeTypeExtension.php
@@ -27,7 +27,7 @@ class TimeTypeExtension extends AbstractTypeExtension
     /**
      * {@inheritdoc}
      */
-    public function finishView(FormView $view, FormInterface $form, array $options)
+    public function finishView(FormView $view, FormInterface $form, array $options): void
     {
         if ('single_text' === $options['widget']) {
             if (isset($options['timepicker'])) {
@@ -42,7 +42,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefined([
             'timepicker',
diff --git a/Form/Extension/WidgetCollectionFormTypeExtension.php b/Form/Extension/WidgetCollectionFormTypeExtension.php
index 1839e398c..5d79bb039 100644
--- a/Form/Extension/WidgetCollectionFormTypeExtension.php
+++ b/Form/Extension/WidgetCollectionFormTypeExtension.php
@@ -41,7 +41,7 @@ public function __construct(array $options)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         if (\in_array('collection', $view->vars['block_prefixes'], true)) {
             if ($options['widget_add_btn'] !== null && !\is_array($options['widget_add_btn'])) {
@@ -78,7 +78,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'omit_collection_item' => true === $this->options['render_collection_item'] ? false : true,
diff --git a/Form/Extension/WidgetFormTypeExtension.php b/Form/Extension/WidgetFormTypeExtension.php
index d1aff2194..f72ec092e 100644
--- a/Form/Extension/WidgetFormTypeExtension.php
+++ b/Form/Extension/WidgetFormTypeExtension.php
@@ -40,7 +40,7 @@ public function __construct(array $options)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         if (\in_array('percent', $view->vars['block_prefixes'], true) && null === $options['widget_addon_append']) {
             $options['widget_addon_append'] = [];
@@ -67,7 +67,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'widget_form_control_class' => 'form-control',
diff --git a/Form/Type/FormActionsType.php b/Form/Type/FormActionsType.php
index b1be57254..76211f986 100644
--- a/Form/Type/FormActionsType.php
+++ b/Form/Type/FormActionsType.php
@@ -28,7 +28,7 @@ class FormActionsType extends AbstractType
     /**
      * {@inheritdoc}
      */
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         foreach ($options['buttons'] as $name => $config) {
             $this->createButton($builder, $name, $config);
@@ -46,7 +46,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
      *
      * @throws \InvalidArgumentException
      */
-    protected function createButton($builder, $name, $config)
+    protected function createButton($builder, $name, $config): ButtonBuilder|FormBuilderInterface
     {
         $options = (isset($config['options'])) ? $config['options'] : [];
 
@@ -58,7 +58,7 @@ protected function createButton($builder, $name, $config)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'buttons' => [],
@@ -71,7 +71,7 @@ public function configureOptions(OptionsResolver $resolver)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['button_offset'] = $options['button_offset'];
     }
@@ -79,7 +79,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function getBlockPrefix()
+    public function getBlockPrefix(): string
     {
         return 'form_actions';
     }
diff --git a/Form/Type/TabType.php b/Form/Type/TabType.php
index 21f9fbe15..1fef41e8f 100644
--- a/Form/Type/TabType.php
+++ b/Form/Type/TabType.php
@@ -26,7 +26,7 @@ class TabType extends AbstractType
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'icon' => null,
@@ -38,7 +38,7 @@ public function configureOptions(OptionsResolver $resolver)
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['valid'] = $valid = !$form->isSubmitted() || $form->isValid();
         $view->vars['icon'] = $valid ? $options['icon'] : $options['error_icon'];
diff --git a/Form/Type/TabsType.php b/Form/Type/TabsType.php
index 0ce831197..88327bc7a 100644
--- a/Form/Type/TabsType.php
+++ b/Form/Type/TabsType.php
@@ -26,7 +26,7 @@ class TabsType extends AbstractType
     /**
      * {@inheritdoc}
      */
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['tabs'] = $options['tabs'];
     }
@@ -34,7 +34,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
     /**
      * {@inheritdoc}
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'tabs' => [],
@@ -44,7 +44,7 @@ public function configureOptions(OptionsResolver $resolver)
     /**
      * {@inheritdoc}
      */
-    public function getBlockPrefix()
+    public function getBlockPrefix(): string
     {
         return 'tabs';
     }
diff --git a/MopaBootstrapBundle.php b/MopaBootstrapBundle.php
index e62f1b54c..df9a33d64 100644
--- a/MopaBootstrapBundle.php
+++ b/MopaBootstrapBundle.php
@@ -20,7 +20,7 @@ class MopaBootstrapBundle extends Bundle
     /**
      * {@inheritdoc}
      */
-    public function build(ContainerBuilder $container)
+    public function build(ContainerBuilder $container): void
     {
         parent::build($container);
         $container->addCompilerPass(new FormPass());
diff --git a/composer.json b/composer.json
index 6f554f54e..23d9890a8 100644
--- a/composer.json
+++ b/composer.json
@@ -23,15 +23,15 @@
     "require": {
         "php": "^7.2 || ^8.0",
         "mopa/composer-bridge": "^1.3",
-        "symfony/console": "^4.4 || ^5.1 || ^6.0",
-        "symfony/form": "^4.4 || ^5.1 || ^6.0",
-        "symfony/framework-bundle": "^4.4 || ^5.1 || ^6.0",
-        "symfony/twig-bundle": "^4.4 || ^5.1 || ^6.0",
+        "symfony/console": "^4.4 || ^5.1 || ^6.0 || ^7.0",
+        "symfony/form": "^4.4 || ^5.1 || ^6.0 || ^7.0",
+        "symfony/framework-bundle": "^4.4 || ^5.1 || ^6.0 || ^7.0",
+        "symfony/twig-bundle": "^4.4 || ^5.1 || ^6.0 || ^7.0",
         "twig/twig": "^2.9 || ^3.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^8.5 || ^9.4",
-        "symfony/security-bundle": "^4.4 || ^5.1 || ^6.0",
+        "symfony/security-bundle": "^4.4 || ^5.1 || ^6.0 || ^7.0",
         "symfony/translation-contracts": "^2.0"
     },
     "suggest": {