diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3ec73e0e..18bcc92e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -18,45 +18,54 @@ jobs:
     tests:
         runs-on: ubuntu-latest
 
-        name: "Sylius ${{ matrix.sylius }}, PHP ${{ matrix.php }}, Symfony ${{ matrix.symfony }}, MySQL ${{ matrix.mysql }}, wkhtmltopdf: ${{ matrix.wkhtmltopdf }}"
+        name: "Sylius ${{ matrix.sylius }}, PHP ${{ matrix.php }}, Symfony ${{ matrix.symfony }}, MySQL ${{ matrix.mysql }}, wkhtmltopdf: ${{ matrix.wkhtmltopdf }}, State Machine Adapter ${{ matrix.state_machine_adapter }}"
 
         strategy:
             fail-fast: false
             matrix:
-                php: ["8.0", "8.1"]
-                symfony: ["^5.4", "^6.0"]
-                sylius: ["~1.11.4", "~1.12.0"]
-                node: ["16.x"]
-                mysql: ["5.7", "8.0"]
+                php: ["8.1", "8.2"]
+                symfony: ["^5.4.21", "^6.4"]
+                sylius: ["~1.12.0", "~1.13.x-dev",]
+                node: ["20.x"]
+                mysql: ["8.0"]
                 wkhtmltopdf: ["0.12.6-1"]
+                state_machine_adapter: [ "winzou_state_machine", "symfony_workflow" ]
 
                 include:
                     -
-                        php: "8.1"
-                        symfony: "^6.0"
+                        php: "8.3"
+                        symfony: "^6.4"
+                        sylius: "~1.13.x-dev"
+                        node: "20.x"
+                        mysql: "8.0"
+                        wkhtmltopdf: "0.12.6-1"
+                        state_machine_adapter: "symfony_workflow"
+                    -
+                        php: "8.2"
+                        symfony: "^6.4"
                         sylius: "~1.12.0"
-                        node: "16.x"
+                        node: "20.x"
                         mysql: "8.0"
                         wkhtmltopdf: false
+                        state_machine_adapter: "winzou_state_machine"
                     -
-                        php: "8.1"
-                        symfony: "^5.4"
-                        sylius: "~1.11.2"
-                        node: "14.x"
+                        php: "8.2"
+                        symfony: "^6.4"
+                        sylius: "~1.13.x-dev"
+                        node: "20.x"
                         mysql: "8.0"
                         wkhtmltopdf: false
+                        state_machine_adapter: "symfony_workflow"
 
                 exclude:
                     -
-                        php: "8.0"
-                        symfony: "^6.0"
-                    -
-                        symfony: "^6.0"
-                        sylius: "~1.11.4"
+                        sylius: "~1.12.0"
+                        state_machine_adapter: "symfony_workflow"
 
         env:
             APP_ENV: test
             DATABASE_URL: "mysql://root:root@127.0.0.1/sylius?serverVersion=${{ matrix.mysql }}"
+            TEST_SYLIUS_STATE_MACHINE_ADAPTER: "${{ matrix.state_machine_adapter }}"
 
         steps:
             -
diff --git a/UPGRADE-1.5.md b/UPGRADE-1.5.md
index 5411f987..9c3413d6 100644
--- a/UPGRADE-1.5.md
+++ b/UPGRADE-1.5.md
@@ -16,3 +16,10 @@
    constructors of `Sylius\RefundPlugin\Converter\LineItem\OrderItemUnitLineItemsConverter` and
    `Sylius\RefundPlugin\Converter\LineItem\ShipmentLineItemsConverter`
    has been deprecated and will be prohibited in 2.0.
+
+5. Support for Sylius 1.13 has been added, it is now the recommended Sylius version to use with RefundPlugin.
+
+6. Support for Sylius 1.11 has been dropped, upgrade your application to [Sylius 1.12](https://github.com/Sylius/Sylius/blob/1.12/UPGRADE-1.12.md).
+   or to [Sylius 1.13](https://github.com/Sylius/Sylius/blob/1.13/UPGRADE-1.13.md).
+
+7. Support for PHP 8.0 has been dropped.
diff --git a/composer.json b/composer.json
index 4008d75a..55351f76 100644
--- a/composer.json
+++ b/composer.json
@@ -19,41 +19,41 @@
         }
     ],
     "require": {
-        "php": "^8.0",
+        "php": "^8.1",
         "knplabs/knp-snappy-bundle": "^1.7",
         "myclabs/php-enum": "^1.7",
         "php-http/message-factory": "^1.1",
-        "sylius/resource-bundle": "^1.6",
-        "sylius/sylius": "~1.11.4 || ~1.12.0",
-        "symfony/messenger": "^5.4 || ^6.0"
+        "sylius/resource-bundle": "^1.9",
+        "sylius/sylius": "~1.12.0 || ~1.13.x-dev",
+        "symfony/messenger": "^5.4.21 || ^6.4"
     },
     "require-dev": {
-        "behat/behat": "^3.6",
+        "behat/behat": "^3.6.1",
         "behat/mink-selenium2-driver": "^1.4",
         "dmore/behat-chrome-extension": "^1.3",
         "dmore/chrome-mink-driver": "^2.7",
         "friends-of-behat/exclude-specifications-extension": "^0.2 || ^0.3",
         "friends-of-behat/mink": "^1.8",
-        "friends-of-behat/mink-browserkit-driver": "^1.3",
+        "friends-of-behat/mink-browserkit-driver": "^1.4",
         "friends-of-behat/mink-debug-extension": "^2.0",
-        "friends-of-behat/mink-extension": "^2.3",
+        "friends-of-behat/mink-extension": "^2.4",
         "friends-of-behat/page-object-extension": "^0.3",
         "friends-of-behat/suite-settings-extension": "^1.0",
         "friends-of-behat/symfony-extension": "^2.1",
         "friends-of-behat/variadic-extension": "^1.3",
-        "matthiasnoback/symfony-config-test": "^4.0",
-        "matthiasnoback/symfony-dependency-injection-test": "^4.1",
-        "phpspec/phpspec": "^7.0",
-        "phpstan/phpstan": "1.5.4",
-        "phpstan/phpstan-webmozart-assert": "1.1.2",
+        "matthiasnoback/symfony-config-test": "^4.2",
+        "matthiasnoback/symfony-dependency-injection-test": "^4.2",
+        "phpspec/phpspec": "^7.2",
+        "phpstan/phpstan": "^1.6",
+        "phpstan/phpstan-webmozart-assert": "^1.1",
         "phpunit/phpunit": "^9.5",
         "polishsymfonycommunity/symfony-mocker-container": "^1.0",
-        "sylius-labs/coding-standard": "~4.3.0",
-        "symfony/browser-kit": "^5.4 || ^6.0",
-        "symfony/debug-bundle": "^5.4 || ^6.0",
-        "symfony/dotenv": "^5.4 || ^6.0",
+        "sylius-labs/coding-standard": "^4.2",
+        "symfony/browser-kit": "^5.4.21 || ^6.4",
+        "symfony/debug-bundle": "^5.4.21 || ^6.4",
+        "symfony/dotenv": "^5.4.21 || ^6.4",
         "symfony/intl": "^5.4 || ^6.0",
-        "symfony/web-profiler-bundle": "^5.4 || ^6.0",
+        "symfony/web-profiler-bundle": "^5.4.21 || ^6.4",
         "symfony/webpack-encore-bundle": "^1.15"
     },
     "conflict": {
diff --git a/ecs.php b/ecs.php
index 7aab94f6..4d179d7a 100644
--- a/ecs.php
+++ b/ecs.php
@@ -9,11 +9,19 @@
 {
     $containerConfigurator->import('vendor/sylius-labs/coding-standard/ecs.php');
 
+    $containerConfigurator->parallel();
     $containerConfigurator->paths([
         'src/',
         'spec/',
     ]);
-    $containerConfigurator->parallel();
+
+    $containerConfigurator->skip([
+        VisibilityRequiredFixer::class => ['*Spec.php'],
+        InlineDocCommentDeclarationSniff::class . '.MissingVariable',
+        'src/Resources/config/**',
+        '**/var/*',
+    ]);
+
     $containerConfigurator->ruleWithConfiguration(
         HeaderCommentFixer::class,
         [
@@ -29,10 +37,4 @@
 TEXT
         ]
     );
-
-    $containerConfigurator->skip([
-        VisibilityRequiredFixer::class => ['*Spec.php'],
-        InlineDocCommentDeclarationSniff::class . '.MissingVariable',
-        '**/var/*',
-    ]);
 };
diff --git a/features/filtering_credit_memos.feature b/features/filtering_credit_memos.feature
index ad8f5ee0..abed6d79 100644
--- a/features/filtering_credit_memos.feature
+++ b/features/filtering_credit_memos.feature
@@ -12,7 +12,7 @@ Feature: Filtering credit memos
         And the store has a zone "United States + United Kingdom" with code "US + UK"
         And this zone has the "United States" country member
         And this zone has the "United Kingdom" country member
-        And the store has a product "Mr. Meeseeks T-Shirt" priced at "$10" available in channel "Web-US" and channel "Web-UK"
+        And the store has a product "Mr. Meeseeks T-Shirt" priced at "$10.00" available in channel "Web-US" and channel "Web-UK"
         And the store ships everywhere for free for all channels
         And the store allows paying offline for all channels
         And there is a customer "rick.sanchez@wubba-lubba-dub-dub.com" that placed an order "#00000001"
diff --git a/features/refunding_single_order_unit_with_promotion_applied.feature b/features/refunding_single_order_unit_with_promotion_applied.feature
index f7dc9309..535a0847 100644
--- a/features/refunding_single_order_unit_with_promotion_applied.feature
+++ b/features/refunding_single_order_unit_with_promotion_applied.feature
@@ -10,7 +10,7 @@ Feature: Refunding a single order unit with promotion applied
         And the store allows shipping with "Galaxy Post"
         And the store allows paying with "Space money"
         And there is a promotion "Anatomy Park Promotion"
-        And this promotion gives "$1" off on every product with minimum price at "$5.00"
+        And this promotion gives "$1.00" off on every product with minimum price at "$5.00"
         And there is a customer "rick.sanchez@wubba-lubba-dub-dub.com" that placed an order "#00000022"
         And the customer bought 2 "Mr. Meeseeks T-Shirt" products
         And the customer chose "Galaxy Post" shipping method to "United States" with "Space money" payment
diff --git a/phpstan.neon b/phpstan.neon
index 2f5f6696..671fb399 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -10,7 +10,7 @@ parameters:
     checkMissingIterableValueType: false
     checkGenericClassInNonGenericObjectType: false
 
-    excludes_analyse:
+    excludePaths:
         # Makes PHPStan crash
         - 'src/DependencyInjection/Configuration.php'
 
diff --git a/src/Resources/config/app/config.yml b/src/Resources/config/app/config.yml
index c92be548..155d9cb0 100644
--- a/src/Resources/config/app/config.yml
+++ b/src/Resources/config/app/config.yml
@@ -1,5 +1,6 @@
 imports:
     - { resource: "@SyliusRefundPlugin/Resources/config/app/events.yaml" }
+    - { resource: "@SyliusRefundPlugin/Resources/config/app/integrations.php" }
 
 parameters:
     sylius_refund.credit_memo_save_path: "%kernel.project_dir%/private/credit_memos/"
diff --git a/src/Resources/config/app/integrations.php b/src/Resources/config/app/integrations.php
new file mode 100644
index 00000000..4ca6519f
--- /dev/null
+++ b/src/Resources/config/app/integrations.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $configurator, ContainerBuilder $container): void {
+    if (class_exists('\Symfony\Component\Workflow\Workflow')) {
+        $configurator->import('../integrations/workflow.yaml');
+    }
+};
diff --git a/src/Resources/config/integrations/workflow.yaml b/src/Resources/config/integrations/workflow.yaml
new file mode 100644
index 00000000..decc1053
--- /dev/null
+++ b/src/Resources/config/integrations/workflow.yaml
@@ -0,0 +1,17 @@
+framework:
+    workflows:
+        sylius_refund_refund_payment:
+            type: state_machine
+            marking_store:
+                type: method
+                property: state
+            supports:
+                - Sylius\RefundPlugin\Entity\RefundPayment
+            initial_marking: new
+            places:
+                - !php/const Sylius\RefundPlugin\Entity\RefundPaymentInterface::STATE_NEW
+                - !php/const Sylius\RefundPlugin\Entity\RefundPaymentInterface::STATE_COMPLETED
+            transitions:
+                complete:
+                    from: !php/const Sylius\RefundPlugin\Entity\RefundPaymentInterface::STATE_NEW
+                    to: !php/const Sylius\RefundPlugin\Entity\RefundPaymentInterface::STATE_COMPLETED
diff --git a/tests/Application/Kernel.php b/tests/Application/Kernel.php
index 2dcdfde2..e47c5e3a 100644
--- a/tests/Application/Kernel.php
+++ b/tests/Application/Kernel.php
@@ -5,28 +5,15 @@
 namespace Tests\Sylius\RefundPlugin\Application;
 
 use PSS\SymfonyMockerContainer\DependencyInjection\MockerContainer;
-use Sylius\Bundle\CoreBundle\Application\Kernel as SyliusKernel;
+use Sylius\Bundle\CoreBundle\SyliusCoreBundle;
 use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
-use Symfony\Component\Config\Loader\LoaderInterface;
-use Symfony\Component\Config\Resource\FileResource;
-use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\HttpKernel\Bundle\BundleInterface;
 use Symfony\Component\HttpKernel\Kernel as BaseKernel;
-use Symfony\Component\Routing\Loader\Configurator\RoutingConfigurator;
 
 final class Kernel extends BaseKernel
 {
     use MicroKernelTrait;
 
-    private const CONFIG_EXTS = '.{php,xml,yaml,yml}';
-
-    private const IGNORED_SERVICES_DURING_CLEANUP = [
-        'kernel',
-        'http_kernel',
-        'liip_imagine.mime_type_guesser',
-        'liip_imagine.extension_guesser',
-    ];
-
     public function getCacheDir(): string
     {
         return $this->getProjectDir() . '/var/cache/' . $this->environment;
@@ -44,26 +31,6 @@ public function registerBundles(): iterable
         }
     }
 
-    protected function configureContainer(ContainerBuilder $container, LoaderInterface $loader): void
-    {
-        foreach ($this->getBundleListFiles() as $file) {
-            $container->addResource(new FileResource($file));
-        }
-
-        $container->setParameter('container.dumper.inline_class_loader', true);
-
-        foreach ($this->getConfigurationDirectories() as $confDir) {
-            $this->loadContainerConfiguration($loader, $confDir);
-        }
-    }
-
-    protected function configureRoutes(RoutingConfigurator $routes): void
-    {
-        foreach ($this->getConfigurationDirectories() as $confDir) {
-            $this->loadRoutesConfiguration($routes, $confDir);
-        }
-    }
-
     protected function getContainerBaseClass(): string
     {
         if ($this->isTestEnvironment() && class_exists(MockerContainer::class)) {
@@ -75,22 +42,7 @@ protected function getContainerBaseClass(): string
 
     private function isTestEnvironment(): bool
     {
-        return 0 === strpos($this->getEnvironment(), 'test');
-    }
-
-    private function loadContainerConfiguration(LoaderInterface $loader, string $confDir): void
-    {
-        $loader->load($confDir . '/{packages}/*' . self::CONFIG_EXTS, 'glob');
-        $loader->load($confDir . '/{packages}/' . $this->environment . '/**/*' . self::CONFIG_EXTS, 'glob');
-        $loader->load($confDir . '/{services}' . self::CONFIG_EXTS, 'glob');
-        $loader->load($confDir . '/{services}_' . $this->environment . self::CONFIG_EXTS, 'glob');
-    }
-
-    private function loadRoutesConfiguration(RoutingConfigurator $routes, string $confDir): void
-    {
-        $routes->import($confDir . '/{routes}/*' . self::CONFIG_EXTS);
-        $routes->import($confDir . '/{routes}/' . $this->environment . '/**/*' . self::CONFIG_EXTS);
-        $routes->import($confDir . '/{routes}' . self::CONFIG_EXTS);
+        return str_starts_with($this->getEnvironment(), 'test');
     }
 
     /**
@@ -100,6 +52,7 @@ private function registerBundlesFromFile(string $bundlesFile): iterable
     {
         $contents = require $bundlesFile;
 
+        /** @var BundleInterface $class */
         foreach ($contents as $class => $envs) {
             if (isset($envs['all']) || isset($envs[$this->environment])) {
                 yield new $class();
@@ -130,7 +83,7 @@ private function getConfigurationDirectories(): array
     {
         $directories = [
             $this->getProjectDir() . '/config',
-            $this->getProjectDir() . '/config/sylius/' . SyliusKernel::MAJOR_VERSION . '.' . SyliusKernel::MINOR_VERSION,
+            $this->getProjectDir() . '/config/sylius/' . SyliusCoreBundle::MAJOR_VERSION . '.' . SyliusCoreBundle::MINOR_VERSION,
         ];
 
         return array_filter($directories, 'file_exists');
diff --git a/tests/Application/config/bundles.php b/tests/Application/config/bundles.php
index 143e9c41..f82c7db5 100644
--- a/tests/Application/config/bundles.php
+++ b/tests/Application/config/bundles.php
@@ -1,6 +1,6 @@
 <?php
 
-use Sylius\Bundle\CoreBundle\Application\Kernel as SyliusKernel;
+use Sylius\Bundle\CoreBundle\SyliusCoreBundle;
 
 $bundles = [
     Symfony\Bundle\FrameworkBundle\FrameworkBundle::class => ['all' => true],
@@ -8,6 +8,7 @@
     Symfony\Bundle\SecurityBundle\SecurityBundle::class => ['all' => true],
     Symfony\Bundle\TwigBundle\TwigBundle::class => ['all' => true],
     Doctrine\Bundle\DoctrineBundle\DoctrineBundle::class => ['all' => true],
+    League\FlysystemBundle\FlysystemBundle::class => ['all' => true],
     Sylius\Bundle\OrderBundle\SyliusOrderBundle::class => ['all' => true],
     Sylius\Bundle\MoneyBundle\SyliusMoneyBundle::class => ['all' => true],
     Sylius\Bundle\CurrencyBundle\SyliusCurrencyBundle::class => ['all' => true],
@@ -61,10 +62,8 @@
     Symfony\WebpackEncoreBundle\WebpackEncoreBundle::class => ['all' => true],
 ];
 
-if (SyliusKernel::MINOR_VERSION > 11) {
-    $bundles[League\FlysystemBundle\FlysystemBundle::class] = ['all' => true];
-} else {
-    $bundles[Symfony\Bundle\SwiftmailerBundle\SwiftmailerBundle::class] = ['all' => true];
+if (SyliusCoreBundle::VERSION_ID >= '11300') {
+    $bundles[Sylius\Abstraction\StateMachine\SyliusStateMachineAbstractionBundle::class] = ['all' => true];
 }
 
 return $bundles;
diff --git a/tests/Application/config/sylius/1.12/packages/mailer.yaml b/tests/Application/config/packages/mailer.yaml
similarity index 100%
rename from tests/Application/config/sylius/1.12/packages/mailer.yaml
rename to tests/Application/config/packages/mailer.yaml
diff --git a/tests/Application/config/sylius/1.12/packages/test/mailer.yaml b/tests/Application/config/packages/test/mailer.yaml
similarity index 75%
rename from tests/Application/config/sylius/1.12/packages/test/mailer.yaml
rename to tests/Application/config/packages/test/mailer.yaml
index 52610d69..092eb288 100644
--- a/tests/Application/config/sylius/1.12/packages/test/mailer.yaml
+++ b/tests/Application/config/packages/test/mailer.yaml
@@ -1,4 +1,6 @@
 framework:
+    mailer:
+        dsn: 'null://null'
     cache:
         pools:
             test.mailer_pool:
diff --git a/tests/Application/config/sylius/1.12/packages/test_cached/mailer.yaml b/tests/Application/config/packages/test_cached/mailer.yaml
similarity index 100%
rename from tests/Application/config/sylius/1.12/packages/test_cached/mailer.yaml
rename to tests/Application/config/packages/test_cached/mailer.yaml
diff --git a/tests/Application/config/sylius/1.11/packages/dev/swiftmailer.yaml b/tests/Application/config/sylius/1.11/packages/dev/swiftmailer.yaml
deleted file mode 100644
index f4380780..00000000
--- a/tests/Application/config/sylius/1.11/packages/dev/swiftmailer.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-swiftmailer:
-    disable_delivery: true
diff --git a/tests/Application/config/sylius/1.11/packages/staging/swiftmailer.yaml b/tests/Application/config/sylius/1.11/packages/staging/swiftmailer.yaml
deleted file mode 100644
index 98d6b73b..00000000
--- a/tests/Application/config/sylius/1.11/packages/staging/swiftmailer.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-imports:
-    - { resource: "../dev/mailer.yaml" }
diff --git a/tests/Application/config/sylius/1.11/packages/swiftmailer.yaml b/tests/Application/config/sylius/1.11/packages/swiftmailer.yaml
deleted file mode 100644
index 3bab0d32..00000000
--- a/tests/Application/config/sylius/1.11/packages/swiftmailer.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-swiftmailer:
-    url: '%env(MAILER_URL)%'
diff --git a/tests/Application/config/sylius/1.11/packages/test/swiftmailer.yaml b/tests/Application/config/sylius/1.11/packages/test/swiftmailer.yaml
deleted file mode 100644
index c438f4b2..00000000
--- a/tests/Application/config/sylius/1.11/packages/test/swiftmailer.yaml
+++ /dev/null
@@ -1,6 +0,0 @@
-swiftmailer:
-    disable_delivery: true
-    logging: true
-    spool:
-        type: file
-        path: "%kernel.cache_dir%/spool"
diff --git a/tests/Application/config/sylius/1.11/packages/test_cached/swiftmailer.yaml b/tests/Application/config/sylius/1.11/packages/test_cached/swiftmailer.yaml
deleted file mode 100644
index 16f3170a..00000000
--- a/tests/Application/config/sylius/1.11/packages/test_cached/swiftmailer.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-imports:
-    - { resource: "../test/mailer.yaml" }
diff --git a/tests/Application/config/sylius/1.13/_sylius.yaml b/tests/Application/config/sylius/1.13/_sylius.yaml
new file mode 100644
index 00000000..76aa43aa
--- /dev/null
+++ b/tests/Application/config/sylius/1.13/_sylius.yaml
@@ -0,0 +1,7 @@
+parameters:
+    test_default_state_machine_adapter: 'symfony_workflow'
+    test_sylius_state_machine_adapter: '%env(string:default:test_default_state_machine_adapter:TEST_SYLIUS_STATE_MACHINE_ADAPTER)%'
+
+sylius_state_machine_abstraction:
+    graphs_to_adapters_mapping:
+        sylius_refund_refund_payment: '%test_sylius_state_machine_adapter%'
diff --git a/tests/Application/package.json b/tests/Application/package.json
index 94b2d1c8..d9d9b90d 100644
--- a/tests/Application/package.json
+++ b/tests/Application/package.json
@@ -52,7 +52,7 @@
     "yargs": "^17.5.1"
   },
   "engines": {
-    "node": "^14 || ^16 || ^18 || ^19"
+    "node": "^18 || ^20"
   },
   "engineStrict": true,
   "scripts": {
diff --git a/tests/Application/public/media/image/.gitignore b/tests/Application/public/media/image/.gitignore
deleted file mode 100644
index e69de29b..00000000