diff --git a/example/out/Simple/SimpleObjectTransfer.php b/example/out/Simple/SimpleObjectTransfer.php
deleted file mode 100644
index 89543ef..0000000
--- a/example/out/Simple/SimpleObjectTransfer.php
+++ /dev/null
@@ -1,94 +0,0 @@
-<?php
-
-/**
- * This file is auto-generated.
- */
-
-declare(strict_types=1);
-
-namespace Transfer\Simple;
-
-use DateTimeInterface;
-use Transfer\Simple\SimpleObjectTransfer as SimpleObjectTransfer1;
-
-final class SimpleObjectTransfer extends \Micro\Library\DTO\Object\AbstractDto
-{
-    #[\Symfony\Component\Validator\Constraints\LessThan(groups: ['Default'], value: '10')]
-    protected int|null $weight = null;
-
-    #[\Symfony\Component\Validator\Constraints\LessThan(groups: ['Default'], propertyPath: 'weight')]
-    protected int|null $height = null;
-    protected SimpleObjectTransfer|null $parent = null;
-
-    public function getWeight(): int|null
-    {
-        return $this->weight;
-    }
-
-    public function getHeight(): int|null
-    {
-        return $this->height;
-    }
-
-    public function getParent(): SimpleObjectTransfer|null
-    {
-        return $this->parent;
-    }
-
-    public function setWeight(int|null $weight): self
-    {
-        $this->weight = $weight;
-
-        return $this;
-    }
-
-    public function setHeight(int|null $height): self
-    {
-        $this->height = $height;
-
-        return $this;
-    }
-
-    public function setParent(SimpleObjectTransfer|null $parent): self
-    {
-        $this->parent = $parent;
-
-        return $this;
-    }
-
-    protected static function attributesMetadata(): array
-    {
-        return array (
-          'weight' =>
-          array (
-            'type' =>
-            array (
-              0 => 'int',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'weight',
-          ),
-          'height' =>
-          array (
-            'type' =>
-            array (
-              0 => 'int',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'height',
-          ),
-          'parent' =>
-          array (
-            'type' =>
-            array (
-              0 => 'Transfer\\Simple\\SimpleObjectTransfer',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'parent',
-          ),
-        );
-    }
-}
diff --git a/example/out/Simple/SimpleUserTransfer.php b/example/out/Simple/SimpleUserTransfer.php
deleted file mode 100644
index 00f8ebd..0000000
--- a/example/out/Simple/SimpleUserTransfer.php
+++ /dev/null
@@ -1,533 +0,0 @@
-<?php
-
-/**
- * This file is auto-generated.
- */
-
-declare(strict_types=1);
-
-namespace Transfer\Simple;
-
-use DateTimeInterface;
-
-final class SimpleUserTransfer extends \Micro\Library\DTO\Object\AbstractDto
-{
-    protected SimpleObjectTransfer|null $parent = null;
-
-    #[\Symfony\Component\Validator\Constraints\Regex(groups: ['Default'], pattern: '/^(.[aA-zA]+)$/', match: true)]
-    #[\Symfony\Component\Validator\Constraints\Length(groups: ['Default'], max: 50, min: 6)]
-    protected string|null $username = null;
-
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\GreaterThan(groups: ['Default'], value: '18')]
-    #[\Symfony\Component\Validator\Constraints\LessThan(groups: ['Default'], value: '100')]
-    protected int|null $age = null;
-
-    #[\Symfony\Component\Validator\Constraints\Email(groups: ['Default'], mode: 'html5')]
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    protected string|null $email = null;
-
-    #[\Symfony\Component\Validator\Constraints\Ip(groups: ['Default'], version: '4')]
-    protected string|null $ip = null;
-
-    #[\Symfony\Component\Validator\Constraints\Hostname(groups: ['test'], requireTld: true)]
-    protected string|null $hostname = null;
-
-    #[\Symfony\Component\Validator\Constraints\Regex(groups: ['Default'], pattern: '/^(.[a-z])+$/', match: true)]
-    protected string|null $sometext = null;
-
-    #[\Symfony\Component\Validator\Constraints\Url(groups: ['Default'], relativeProtocol: true)]
-    protected string|null $url = null;
-
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\Json(groups: ['Default'])]
-    protected string|null $json = null;
-
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\Uuid(groups: ['Default'], versions: [1, 2, 3, 4, 5, 6], strict: true)]
-    protected string|null $uuid = null;
-
-    #[\Symfony\Component\Validator\Constraints\DateTime(groups: ['Default'], format: 'Y-m-d H:i:s')]
-    protected string|null $created_at = null;
-
-    #[\Symfony\Component\Validator\Constraints\Date(groups: ['Default'])]
-    protected string|null $updated_at = null;
-
-    #[\Symfony\Component\Validator\Constraints\Timezone(groups: ['Default'], countryCode: 'BY', intlCompatible: true, zone: 4096)]
-    protected string|null $timezone = null;
-
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\CardScheme(groups: ['Default'], schemes: ['MASTERCARD'])]
-    #[\Symfony\Component\Validator\Constraints\Luhn(groups: ['Default'])]
-    protected string|null $card_scheme = null;
-
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\Bic(groups: ['Default'])]
-    protected string|null $bic = null;
-
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\Currency(groups: ['Default'])]
-    protected string|null $currency = null;
-
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\Iban(groups: ['Default'])]
-    protected string|null $iban = null;
-
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\Isbn(groups: ['Default'], type: 'isbn13')]
-    protected string|null $isbn = null;
-
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\Issn(groups: ['Default'])]
-    protected string|null $issn = null;
-
-    #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\Isin(groups: ['Default'])]
-    protected string|null $isin = null;
-
-    public function getParent(): SimpleObjectTransfer|null
-    {
-        return $this->parent;
-    }
-
-    public function getUsername(): string|null
-    {
-        return $this->username;
-    }
-
-    public function getAge(): int|null
-    {
-        return $this->age;
-    }
-
-    public function getEmail(): string|null
-    {
-        return $this->email;
-    }
-
-    public function getIp(): string|null
-    {
-        return $this->ip;
-    }
-
-    public function getHostname(): string|null
-    {
-        return $this->hostname;
-    }
-
-    public function getSometext(): string|null
-    {
-        return $this->sometext;
-    }
-
-    public function getUrl(): string|null
-    {
-        return $this->url;
-    }
-
-    public function getJson(): string|null
-    {
-        return $this->json;
-    }
-
-    public function getUuid(): string|null
-    {
-        return $this->uuid;
-    }
-
-    public function getCreatedAt(): string|null
-    {
-        return $this->created_at;
-    }
-
-    public function getUpdatedAt(): string|null
-    {
-        return $this->updated_at;
-    }
-
-    public function getTimezone(): string|null
-    {
-        return $this->timezone;
-    }
-
-    public function getCardScheme(): string|null
-    {
-        return $this->card_scheme;
-    }
-
-    public function getBic(): string|null
-    {
-        return $this->bic;
-    }
-
-    public function getCurrency(): string|null
-    {
-        return $this->currency;
-    }
-
-    public function getIban(): string|null
-    {
-        return $this->iban;
-    }
-
-    public function getIsbn(): string|null
-    {
-        return $this->isbn;
-    }
-
-    public function getIssn(): string|null
-    {
-        return $this->issn;
-    }
-
-    public function getIsin(): string|null
-    {
-        return $this->isin;
-    }
-
-    public function setParent(SimpleObjectTransfer|null $parent): self
-    {
-        $this->parent = $parent;
-
-        return $this;
-    }
-
-    public function setUsername(string|null $username): self
-    {
-        $this->username = $username;
-
-        return $this;
-    }
-
-    public function setAge(int|null $age): self
-    {
-        $this->age = $age;
-
-        return $this;
-    }
-
-    public function setEmail(string|null $email): self
-    {
-        $this->email = $email;
-
-        return $this;
-    }
-
-    public function setIp(string|null $ip): self
-    {
-        $this->ip = $ip;
-
-        return $this;
-    }
-
-    public function setHostname(string|null $hostname): self
-    {
-        $this->hostname = $hostname;
-
-        return $this;
-    }
-
-    public function setSometext(string|null $sometext): self
-    {
-        $this->sometext = $sometext;
-
-        return $this;
-    }
-
-    public function setUrl(string|null $url): self
-    {
-        $this->url = $url;
-
-        return $this;
-    }
-
-    public function setJson(string|null $json): self
-    {
-        $this->json = $json;
-
-        return $this;
-    }
-
-    public function setUuid(string|null $uuid): self
-    {
-        $this->uuid = $uuid;
-
-        return $this;
-    }
-
-    public function setCreatedAt(string|null $created_at): self
-    {
-        $this->created_at = $created_at;
-
-        return $this;
-    }
-
-    public function setUpdatedAt(string|null $updated_at): self
-    {
-        $this->updated_at = $updated_at;
-
-        return $this;
-    }
-
-    public function setTimezone(string|null $timezone): self
-    {
-        $this->timezone = $timezone;
-
-        return $this;
-    }
-
-    public function setCardScheme(string|null $card_scheme): self
-    {
-        $this->card_scheme = $card_scheme;
-
-        return $this;
-    }
-
-    public function setBic(string|null $bic): self
-    {
-        $this->bic = $bic;
-
-        return $this;
-    }
-
-    public function setCurrency(string|null $currency): self
-    {
-        $this->currency = $currency;
-
-        return $this;
-    }
-
-    public function setIban(string|null $iban): self
-    {
-        $this->iban = $iban;
-
-        return $this;
-    }
-
-    public function setIsbn(string|null $isbn): self
-    {
-        $this->isbn = $isbn;
-
-        return $this;
-    }
-
-    public function setIssn(string|null $issn): self
-    {
-        $this->issn = $issn;
-
-        return $this;
-    }
-
-    public function setIsin(string|null $isin): self
-    {
-        $this->isin = $isin;
-
-        return $this;
-    }
-
-    protected static function attributesMetadata(): array
-    {
-        return array (
-          'parent' =>
-          array (
-            'type' =>
-            array (
-              0 => 'Transfer\\Simple\\SimpleObjectTransfer',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'parent',
-          ),
-          'username' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'username',
-          ),
-          'age' =>
-          array (
-            'type' =>
-            array (
-              0 => 'int',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'age',
-          ),
-          'email' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'email',
-          ),
-          'ip' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'ip',
-          ),
-          'hostname' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'hostname',
-          ),
-          'sometext' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'sometext',
-          ),
-          'url' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'url',
-          ),
-          'json' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'json',
-          ),
-          'uuid' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'uuid',
-          ),
-          'created_at' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'createdAt',
-          ),
-          'updated_at' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'updatedAt',
-          ),
-          'timezone' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'timezone',
-          ),
-          'card_scheme' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'cardScheme',
-          ),
-          'bic' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'bic',
-          ),
-          'currency' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'currency',
-          ),
-          'iban' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'iban',
-          ),
-          'isbn' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'isbn',
-          ),
-          'issn' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'issn',
-          ),
-          'isin' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'isin',
-          ),
-        );
-    }
-}
diff --git a/example/out/UserTransfer.php b/example/out/UserTransfer.php
deleted file mode 100644
index 2c436aa..0000000
--- a/example/out/UserTransfer.php
+++ /dev/null
@@ -1,181 +0,0 @@
-<?php
-
-/**
- * This file is auto-generated.
- */
-
-declare(strict_types=1);
-
-namespace Transfer;
-
-use DateTimeInterface;
-use Micro\Library\DTO\Object\AbstractDto;
-use Micro\Library\DTO\Object\Collection;
-
-/**
- * @deprecated Please, use gSON
- * Example class description
- */
-final class UserTransfer extends AbstractDto
-{
-    /**
-     * Username
-     * @deprecated Deprecation  message
-     */
-    protected string|int|null $username = null;
-    protected iterable|null $books = null;
-    protected string|int $first_name;
-    protected DateTimeInterface|null $updatedAt = null;
-    protected AbstractDto|null $someclass = null;
-    protected mixed $testMixed = null;
-
-    public function getUsername(): string|int|null
-    {
-        return $this->username;
-    }
-
-    public function getBooks(): iterable|null
-    {
-        return $this->books;
-    }
-
-    public function getFirstName(): string|int
-    {
-        return $this->first_name;
-    }
-
-    public function getUpdatedAt(): DateTimeInterface|null
-    {
-        return $this->updatedAt;
-    }
-
-    public function getSomeclass(): AbstractDto|null
-    {
-        return $this->someclass;
-    }
-
-    public function getTestMixed(): mixed
-    {
-        return $this->testMixed;
-    }
-
-    public function setUsername(string|int|null $username): self
-    {
-        $this->username = $username;
-
-        return $this;
-    }
-
-    public function setBooks(iterable|null $books): self
-    {
-        if(!$books) {
-                        $this->books = null;
-
-                        return $this;
-                    }
-
-                    if(!$this->books) {
-                        $this->books = new Collection();
-                    }
-
-                    foreach($books as $item) {
-                        $this->books->add($item);
-                    }
-
-                    return $this;
-    }
-
-    public function setFirstName(string|int $first_name): self
-    {
-        $this->first_name = $first_name;
-
-        return $this;
-    }
-
-    public function setUpdatedAt(DateTimeInterface|null $updatedAt): self
-    {
-        $this->updatedAt = $updatedAt;
-
-        return $this;
-    }
-
-    public function setSomeclass(AbstractDto|null $someclass): self
-    {
-        $this->someclass = $someclass;
-
-        return $this;
-    }
-
-    public function setTestMixed(mixed $testMixed): self
-    {
-        $this->testMixed = $testMixed;
-
-        return $this;
-    }
-
-    protected static function attributesMetadata(): array
-    {
-        return array (
-          'username' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'int',
-              2 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'username',
-          ),
-          'books' =>
-          array (
-            'type' =>
-            array (
-              0 => 'iterable',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'books',
-          ),
-          'first_name' =>
-          array (
-            'type' =>
-            array (
-              0 => 'string',
-              1 => 'int',
-            ),
-            'required' => true,
-            'actionName' => 'firstName',
-          ),
-          'updatedAt' =>
-          array (
-            'type' =>
-            array (
-              0 => 'DateTimeInterface',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'updatedAt',
-          ),
-          'someclass' =>
-          array (
-            'type' =>
-            array (
-              0 => 'Micro\\Library\\DTO\\Object\\AbstractDto',
-              1 => 'null',
-            ),
-            'required' => false,
-            'actionName' => 'someclass',
-          ),
-          'testMixed' =>
-          array (
-            'type' =>
-            array (
-              0 => 'mixed',
-            ),
-            'required' => false,
-            'actionName' => 'testMixed',
-          ),
-        );
-    }
-}
diff --git a/src/ClassDef/PropertyDefinition.php b/src/ClassDef/PropertyDefinition.php
index ce0ebca..c8ad82d 100644
--- a/src/ClassDef/PropertyDefinition.php
+++ b/src/ClassDef/PropertyDefinition.php
@@ -27,7 +27,7 @@ class PropertyDefinition
     private array $types = [];
 
     /**
-     * @var array<string, mixed>
+     * @var array<array<string, mixed>>
      */
     private array $attributes = [];
 
@@ -126,11 +126,9 @@ public function setIsCollection(bool $isCollection): void
      */
     public function addAttribute(string $attributeName, array $arguments): self
     {
-        if (!\array_key_exists($attributeName, $this->attributes)) {
-            $this->attributes[$attributeName] = [];
-        }
-
-        $this->attributes[$attributeName] = array_merge($this->attributes[$attributeName], $arguments);
+        $this->attributes[] = [
+            $attributeName => $arguments,
+        ];
 
         return $this;
     }
diff --git a/src/Preparation/Processor/Property/Assert/AbstractComparisonStrategy.php b/src/Preparation/Processor/Property/Assert/AbstractComparisonStrategy.php
index e573fa7..59569fa 100644
--- a/src/Preparation/Processor/Property/Assert/AbstractComparisonStrategy.php
+++ b/src/Preparation/Processor/Property/Assert/AbstractComparisonStrategy.php
@@ -18,9 +18,13 @@ abstract class AbstractComparisonStrategy extends AbstractConstraintStrategy
     protected function generateArguments(array $config): array
     {
         $parent = parent::generateArguments($config);
+        $value = $config['value'] ?? false;
+        $int = (int) $value;
+        $float = (float) $value;
+
         $current = [
             'propertyPath' => $config['property_path'] ?? null,
-            'value' => $config['value'] ?? null,
+            'value' => ($int == $float) ? $int : $float,
         ];
 
         return array_filter(array_merge($parent, $current));
diff --git a/src/Preparation/Processor/Property/Assert/AbstractConstraintStrategy.php b/src/Preparation/Processor/Property/Assert/AbstractConstraintStrategy.php
index bef77a6..a356460 100644
--- a/src/Preparation/Processor/Property/Assert/AbstractConstraintStrategy.php
+++ b/src/Preparation/Processor/Property/Assert/AbstractConstraintStrategy.php
@@ -21,14 +21,14 @@ abstract class AbstractConstraintStrategy implements PropertyProcessorInterface
 {
     public function process(PropertyDefinition $propertyDefinition, ClassDefinition $classDefinition, array $propertyData, array $classList): void
     {
-        foreach ($propertyData as $config) {
-            $validatorData = $config[$this->getValidatorProperty()] ?? null;
-            if (null === $validatorData) {
-                continue;
-            }
-
-            $this->addAttribute($propertyDefinition, $this->getAttributeClassName(), $this->generateArguments($validatorData));
+        $validatorProperty = $this->getValidatorProperty();
+        if (!isset($propertyData[$validatorProperty])) {
+            return;
         }
+
+        $validatorData = $propertyData[$validatorProperty] ?? [];
+
+        $this->addAttribute($propertyDefinition, $this->generateArguments($validatorData));
     }
 
     protected function stringToBool(string $boolValue): bool
@@ -56,7 +56,7 @@ protected function explodeString(string $string, string $separator = ','): array
     /**
      * @param array<string|mixed> $arguments
      */
-    protected function addAttribute(PropertyDefinition $propertyDefinition, string $attributeClass, array $arguments): void
+    protected function addAttribute(PropertyDefinition $propertyDefinition, array $arguments): void
     {
         $propertyDefinition->addAttribute($this->getAttributeClassName(), $arguments);
     }
@@ -70,7 +70,7 @@ protected function generateArguments(array $config): array
     {
         return array_filter([
             'message' => $config['message'] ?? null,
-            'groups' => $this->explodeString($config['groups']),
+            'groups' => $this->explodeString($config['groups'] ?? 'Default'),
         ]);
     }
 
diff --git a/src/Preparation/Processor/Property/AttributeValidationProcessor.php b/src/Preparation/Processor/Property/AttributeValidationProcessor.php
index 9bb41e9..58d802a 100644
--- a/src/Preparation/Processor/Property/AttributeValidationProcessor.php
+++ b/src/Preparation/Processor/Property/AttributeValidationProcessor.php
@@ -32,8 +32,31 @@ public function process(PropertyDefinition $propertyDefinition, ClassDefinition
             return;
         }
 
-        foreach ($this->validatorProcessor as $processor) {
-            $processor->process($propertyDefinition, $classDefinition, $propertyData['validation'], $classList);
+        $propertyValidationConstraints = $propertyData['validation'];
+        foreach ($propertyValidationConstraints as $constraint) {
+            $this->processAddConstraints($propertyDefinition, $classDefinition, $constraint, $classList);
+        }
+    }
+
+    /**
+     * @param PropertyDefinition          $propertyDefinition
+     * @param ClassDefinition             $classDefinition
+     * @param array<array<string, mixed>> $constraints
+     * @param string[]                    $classList
+     *
+     * @return void
+     */
+    protected function processAddConstraints(PropertyDefinition $propertyDefinition, ClassDefinition $classDefinition, array $constraints, array $classList): void
+    {
+        foreach ($constraints as $constraint) {
+            foreach ($this->validatorProcessor as $processor) {
+                /**
+                 * @phpstan-ignore-next-line
+                 *
+                 * @psalm-suppress InvalidArrayOffset
+                 */
+                $processor->process($propertyDefinition, $classDefinition, [$constraint[0] => $constraint[1]], $classList);
+            }
         }
     }
 }
diff --git a/src/Reader/XmlReader.php b/src/Reader/XmlReader.php
index f901b27..127d96f 100755
--- a/src/Reader/XmlReader.php
+++ b/src/Reader/XmlReader.php
@@ -152,11 +152,7 @@ protected function parseValidation(\DOMNode $attribute): array|null
                     $constraintAttributes = [];
                 }
 
-                if (!\array_key_exists('groups', $constraintAttributes)) {
-                    $constraintAttributes['groups'] = 'Default';
-                }
-
-                $groupConstraints[$constraintNode->nodeName] = $constraintAttributes;
+                $groupConstraints[] = [$constraintNode->nodeName, $constraintAttributes];
             }
 
             $constraints[] = $groupConstraints;
diff --git a/src/View/Nette/NetteRenderer.php b/src/View/Nette/NetteRenderer.php
index d7fc666..2733951 100644
--- a/src/View/Nette/NetteRenderer.php
+++ b/src/View/Nette/NetteRenderer.php
@@ -94,8 +94,10 @@ protected function provideProperty(ClassType $classType, PropertyDefinition $pro
             $property->addComment($comment);
         }
 
-        foreach ($propertyDefinition->getAttributes() as $attribute => $arguments) {
-            $property->addAttribute($attribute, $arguments);
+        foreach ($propertyDefinition->getAttributes() as $attribute) {
+            foreach ($attribute as $attrName => $attrArgs) {
+                $property->addAttribute($attrName, $attrArgs);
+            }
         }
 
         $classType->addMember($property);
diff --git a/tests/Unit/Out/Simple/SimpleObjectTransfer.php b/tests/Unit/Out/Simple/SimpleObjectTransfer.php
index a3fd9ad..ee40c10 100644
--- a/tests/Unit/Out/Simple/SimpleObjectTransfer.php
+++ b/tests/Unit/Out/Simple/SimpleObjectTransfer.php
@@ -13,7 +13,7 @@
 
 final class SimpleObjectTransfer extends \Micro\Library\DTO\Object\AbstractDto
 {
-    #[\Symfony\Component\Validator\Constraints\LessThan(groups: ['Default'], value: '10')]
+    #[\Symfony\Component\Validator\Constraints\LessThan(groups: ['Default'], value: 10)]
     protected int|null $weight = null;
 
     #[\Symfony\Component\Validator\Constraints\LessThan(groups: ['Default'], propertyPath: 'weight')]
diff --git a/tests/Unit/Out/Simple/SimpleUserTransfer.php b/tests/Unit/Out/Simple/SimpleUserTransfer.php
index 5510e28..558b2af 100644
--- a/tests/Unit/Out/Simple/SimpleUserTransfer.php
+++ b/tests/Unit/Out/Simple/SimpleUserTransfer.php
@@ -14,13 +14,13 @@ final class SimpleUserTransfer extends \Micro\Library\DTO\Object\AbstractDto
 {
     protected SimpleObjectTransfer|null $parent = null;
 
-    #[\Symfony\Component\Validator\Constraints\Regex(groups: ['Default'], pattern: '/^(.[aA-zA]+)$/', match: true)]
     #[\Symfony\Component\Validator\Constraints\Length(groups: ['Default'], max: 50, min: 6)]
+    #[\Symfony\Component\Validator\Constraints\Regex(groups: ['Default'], pattern: '/^(.[aA-zA]+)$/', match: true)]
     protected string|null $username = null;
 
     #[\Symfony\Component\Validator\Constraints\NotBlank(groups: ['Default'], allowNull: false)]
-    #[\Symfony\Component\Validator\Constraints\GreaterThan(groups: ['Default'], value: '18')]
-    #[\Symfony\Component\Validator\Constraints\LessThan(groups: ['Default'], value: '100')]
+    #[\Symfony\Component\Validator\Constraints\GreaterThan(groups: ['Default'], value: 18)]
+    #[\Symfony\Component\Validator\Constraints\LessThan(groups: ['Default'], value: 100)]
     protected int|null $age = null;
 
     #[\Symfony\Component\Validator\Constraints\Email(groups: ['Default'], mode: 'html5')]
@@ -30,6 +30,7 @@ final class SimpleUserTransfer extends \Micro\Library\DTO\Object\AbstractDto
     #[\Symfony\Component\Validator\Constraints\Ip(groups: ['Default'], version: '4')]
     protected string|null $ip = null;
 
+    #[\Symfony\Component\Validator\Constraints\Hostname(groups: ['Default'], requireTld: false)]
     #[\Symfony\Component\Validator\Constraints\Hostname(groups: ['test'], requireTld: true)]
     protected string|null $hostname = null;
 
diff --git a/tests/Unit/example.xml b/tests/Unit/example.xml
index 38c6d9c..70ff1a0 100755
--- a/tests/Unit/example.xml
+++ b/tests/Unit/example.xml
@@ -6,7 +6,7 @@
     <class name="Simple\SimpleObject">
         <property name="weight" type="int">
             <validation>
-                <less_than value="10"/>
+                <less_than value="10" />
             </validation>
         </property>
     </class>