diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 60bb218..aed5be2 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -17,8 +17,7 @@ class Configuration implements ConfigurationInterface
      */
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('acseo_dynamic_form');
+        $treeBuilder = new TreeBuilder('acseo_dynamic_form');
 
         return $treeBuilder;
     }
diff --git a/Form/Extension/FieldTypeHelpExtension.php b/Form/Extension/FieldTypeHelpExtension.php
index 9d14488..110fadc 100644
--- a/Form/Extension/FieldTypeHelpExtension.php
+++ b/Form/Extension/FieldTypeHelpExtension.php
@@ -51,11 +51,8 @@ public function configureOptions(OptionsResolver $resolver)
         ));
     }
 
-    /**
-     * @return string
-     */
-    public function getExtendedType()
+    public static function getExtendedTypes(): iterable
     {
-        return FormType::class;
+        return [FormType::class];
     }
 }
diff --git a/Form/Extension/FieldTypePictoExtension.php b/Form/Extension/FieldTypePictoExtension.php
index 8495f02..ea47e68 100644
--- a/Form/Extension/FieldTypePictoExtension.php
+++ b/Form/Extension/FieldTypePictoExtension.php
@@ -51,11 +51,8 @@ public function configureOptions(OptionsResolver $resolver)
         ));
     }
 
-    /**
-     * @return string
-     */
-    public function getExtendedType()
+    public static function getExtendedTypes(): iterable
     {
-        return FormType::class;
+        return [FormType::class];
     }
 }
diff --git a/Form/Extension/FieldTypePopinExtension.php b/Form/Extension/FieldTypePopinExtension.php
index 3383647..e3ad4f8 100644
--- a/Form/Extension/FieldTypePopinExtension.php
+++ b/Form/Extension/FieldTypePopinExtension.php
@@ -52,11 +52,8 @@ public function configureOptions(OptionsResolver $resolver)
         ));
     }
 
-    /**
-     * @return string
-     */
-    public function getExtendedType()
+    public static function getExtendedTypes(): iterable
     {
-        return FormType::class;
+        return [FormType::class];
     }
 }
diff --git a/composer.json b/composer.json
index 096135a..081a5e1 100644
--- a/composer.json
+++ b/composer.json
@@ -1,24 +1,27 @@
 {
     "name": "acseo/dynamic-form-bundle",
     "type": "symfony-bundle",
-    "description": "Symfony2 From generator from array description",
+    "description": "Symfony From generator from array description",
     "keywords": ["Symfony", "form", "generator"],
     "homepage": "https://github.com/acseo/DynamicFormBundle",
     "authors": [
         {
             "name": "Hubert MARIN",
             "email": "Hubert.Marin@acseo-conseil.fr"
+        },
+        {
+            "name": "Romain GUERRERO",
+            "email": "romain.guerrero@acseo-conseil.fr"
         }
     ],
     "require": {
-        "php": ">=5.3.2",
-        "symfony/config": "~3.1|^4.0|^5.0",
-        "symfony/dependency-injection": "~3.1|^4.0|^5.0",
-        "symfony/event-dispatcher": "~3.1|^4.0|^5.0",
-        "symfony/form": "~3.1|^4.0|^5.0",
-        "symfony/http-kernel": "~3.1|^4.0|^5.0",
-        "symfony/options-resolver": "~3.1|^4.0|^5.0",
-        "symfony/validator": "~3.1|^4.0|^5.0"
+        "symfony/config": "^5.0",
+        "symfony/dependency-injection": "^5.0",
+        "symfony/event-dispatcher": "^5.0",
+        "symfony/form": "^5.0",
+        "symfony/http-kernel": "^5.0",
+        "symfony/options-resolver": "^5.0",
+        "symfony/validator": "^5.0"
     },
     "autoload": {
         "psr-0": { "ACSEO\\Bundle\\DynamicFormBundle": "" }
@@ -27,7 +30,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-master": "3.3-dev"
+            "dev-master": "4.0-dev"
         }
     }
 }