diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 90a2aec..6b93814 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -15,17 +15,11 @@ jobs:
     strategy:
       matrix:
         include:
-          - php-version: 7.4
-            symfony-version: 4.4.*
-            sonata-version: ^4.0
-          - php-version: 8.0
-            symfony-version: 5.4.*
-            sonata-version: ^4.0
           - php-version: 8.1
-            symfony-version: 6.1.*
+            symfony-version: 6.4.*
             sonata-version: ^4.0
-          - php-version: 8.3
-            symfony-version: 7.2.*
+          - php-version: 8.4
+            symfony-version: 7.3.*
             sonata-version: ^4.0
 
     steps:
@@ -54,8 +48,8 @@ jobs:
     strategy:
       matrix:
         include:
-          - php-version: 8.1
-            symfony-version: 6.1.*
+          - php-version: 8.4
+            symfony-version: 7.3.*
 
     steps:
       - name: "Checkout"
@@ -81,8 +75,8 @@ jobs:
     strategy:
       matrix:
         include:
-          - php-version: 8.1
-            symfony-version: 6.1.*
+          - php-version: 8.4
+            symfony-version: 7.3.*
 
     steps:
       - name: "Checkout"
diff --git a/composer.json b/composer.json
index 8172e5b..d235234 100644
--- a/composer.json
+++ b/composer.json
@@ -25,9 +25,9 @@
     }
   },
   "require": {
-    "php": "^7.4|^8.0",
+    "php": "^8.0",
     "sonata-project/admin-bundle": "^4.0",
-    "symfony/workflow": "^4.4|^5.0|^6.0|^7.0"
+    "symfony/workflow": "^6.0|^7.0"
   },
   "require-dev": {
     "phpunit/phpunit": "^9.5",
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index b25a8a1..705c0f6 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -15,7 +15,11 @@
 
     <rule ref="Generic.PHP.ForbiddenFunctions">
         <properties>
-            <property name="forbiddenFunctions" type="array" value="dump=>null,var_dump=>null,die=>null"/>
+            <property name="forbiddenFunctions" type="array">
+                <element key="dump" value="null"/>
+                <element key="var_dump" value="null"/>
+                <element key="die" value="null"/>
+            </property>
         </properties>
     </rule>
 
diff --git a/src/Admin/Extension/WorkflowExtension.php b/src/Admin/Extension/WorkflowExtension.php
index 4e9260e..f5fd65e 100644
--- a/src/Admin/Extension/WorkflowExtension.php
+++ b/src/Admin/Extension/WorkflowExtension.php
@@ -107,7 +107,7 @@ public function getAccessMapping(AdminInterface $admin): array
     /**
      * @throws InvalidArgumentException
      */
-    protected function getWorkflow(object $subject, string $workflowName = null): WorkflowInterface
+    protected function getWorkflow(object $subject, string|null $workflowName = null): WorkflowInterface
     {
         return $this->registry->get($subject, $workflowName);
     }