diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 8deb964..190aab4 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -10,7 +10,7 @@ jobs:
         name: PHPStan
         steps:
             - name: Checkout
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
             - name: PHPStan
               uses: docker://oskarstark/phpstan-ga
               env:
@@ -22,7 +22,7 @@ jobs:
         name: PHP-CS-Fixer
         steps:
             - name: Checkout
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
             - name: Fix CS
               uses: docker://oskarstark/php-cs-fixer-ga
     tests:
@@ -31,14 +31,15 @@ jobs:
             matrix:
                 include:
                     - description: 'Lowest'
-                      php: '8.0'
-                      composer_option: '--prefer-lowest'
-                    - description: 'Symfony 5.4'
                       php: '8.1'
-                      symfony: 5.4.*
-                    - description: 'Symfony 6.2'
+                      symfony: 6.4.*@dev
+                      composer_option: '--prefer-lowest'
+                    - description: 'Symfony 6.4'
                       php: '8.2'
-                      symfony: 6.2.*
+                      symfony: 6.4.*@dev
+                    - description: 'Symfony 7.0'
+                      php: '8.3'
+                      symfony: 7.0.*@dev
         name: PHP ${{ matrix.php }} tests (${{ matrix.description }})
         steps:
             - name: Checkout
@@ -52,9 +53,17 @@ jobs:
               uses: shivammathur/setup-php@v2
               with:
                   php-version: ${{ matrix.php }}
-            - run: |
-                  sed -ri 's/"symfony\/(.+)": "(.+)"/"symfony\/\1": "'${{ matrix.symfony }}'"/' composer.json;
+            - name: Require specific Symfony version
               if: matrix.symfony
-            - run: composer update --no-interaction --no-progress --ansi ${{ matrix.composer_option }}
-            - run: vendor/bin/phpunit
+              run: |
+                  sed -ri 's/"symfony\/(.+)": "(.+)"/"symfony\/\1": "'${{ matrix.symfony }}'"/' composer.json;
+            - name: Use possible dev deps
+              if: contains(matrix.symfony, '@dev')
+              run: |
+                  composer config minimum-stability dev 
+                  composer config prefer-stable true
+            - name: Update vendors
+              run: composer update --no-interaction --no-progress --ansi ${{ matrix.composer_option }}
+            - name: Run tests
+              run: vendor/bin/phpunit
 
diff --git a/.php-cs-fixer.php b/.php-cs-fixer.php
index b8939f3..b46948b 100644
--- a/.php-cs-fixer.php
+++ b/.php-cs-fixer.php
@@ -10,9 +10,8 @@
     ->setRules([
         '@Symfony' => true,
         '@Symfony:risky' => true,
-        '@PHP80Migration:risky' => true,
+        '@PHP81Migration' => true,
         '@PHPUnit84Migration:risky' => true,
-        'ordered_imports' => true,
         'declare_strict_types' => false,
         'native_function_invocation' => ['include' => ['@all']],
         'php_unit_mock_short_will_return' => true,
diff --git a/composer.json b/composer.json
index c6c350a..b5459c2 100644
--- a/composer.json
+++ b/composer.json
@@ -11,15 +11,15 @@
         }
     ],
     "require": {
-        "php": "^8.0",
-        "symfony/config": "^5.4 || ^6.0",
-        "symfony/dependency-injection": "^5.4 || ^6.0",
-        "symfony/form": "^5.4 || ^6.0",
-        "symfony/http-kernel": "^5.4 || ^6.0",
-        "twig/twig": "^3.0"
+        "php": "^8.1",
+        "symfony/config": "^6.4 || ^7.0",
+        "symfony/dependency-injection": "^6.4 || ^7.0",
+        "symfony/form": "^6.4 || ^7.0",
+        "symfony/http-kernel": "^6.4 || ^7.0",
+        "twig/twig": "^3.8"
     },
     "require-dev": {
-        "dg/bypass-finals": "^1.3",
+        "dg/bypass-finals": "^1.5",
         "phpunit/phpunit": "^9.6"
     },
     "config": {
diff --git a/src/Filter.php b/src/Filter.php
index 066534a..31ffff8 100644
--- a/src/Filter.php
+++ b/src/Filter.php
@@ -13,11 +13,10 @@
 final class Filter
 {
     /** @var array<int|string, FormInterface> */
-    private array $forms;
+    private array $forms = [];
 
     public function __construct(private FormFactoryInterface $formFactory, private RequestStack $requestStack)
     {
-        $this->forms = [];
     }
 
     /**
diff --git a/tests/DependencyInjection/FilterExtensionTest.php b/tests/DependencyInjection/FilterExtensionTest.php
index 069ecc9..c5bfbbb 100644
--- a/tests/DependencyInjection/FilterExtensionTest.php
+++ b/tests/DependencyInjection/FilterExtensionTest.php
@@ -22,7 +22,7 @@ public function testPrependWithoutTwig(): void
         /** @var ContainerBuilder&\PHPUnit\Framework\MockObject\MockObject $container */
         $container = $this->getMockBuilder(ContainerBuilder::class)->disableOriginalConstructor()->getMock();
         $container->expects(self::once())->method('hasExtension')->willReturn(false);
-        $container->expects(self::never())->method('prependExtensionConfig')->willReturn(true);
+        $container->expects(self::never())->method('prependExtensionConfig');
         $extension = new FilterExtension();
         $extension->prepend($container);
     }
@@ -32,7 +32,7 @@ public function testPrependWithTwig(): void
         /** @var ContainerBuilder&\PHPUnit\Framework\MockObject\MockObject $container */
         $container = $this->getMockBuilder(ContainerBuilder::class)->disableOriginalConstructor()->getMock();
         $container->expects(self::once())->method('hasExtension')->willReturn(true);
-        $container->expects(self::once())->method('prependExtensionConfig')->willReturn(true);
+        $container->expects(self::once())->method('prependExtensionConfig');
         $extension = new FilterExtension();
         $extension->prepend($container);
     }