diff --git a/src/Attribute/AbstractProperty.php b/src/Attribute/AbstractProperty.php
index 7c0e36a..4d1038f 100644
--- a/src/Attribute/AbstractProperty.php
+++ b/src/Attribute/AbstractProperty.php
@@ -9,6 +9,7 @@ abstract class AbstractProperty
     public function __construct(
         public string $name,
         public string $description,
+        public bool $required,
     ) {
     }
 
@@ -17,6 +18,7 @@ public function toArray(): array
         return [
             'name' => $this->name,
             'description' => $this->description,
+            'required' => $this->required,
         ];
     }
 }
diff --git a/src/Attribute/Property.php b/src/Attribute/Property.php
index 87b5b63..0213900 100644
--- a/src/Attribute/Property.php
+++ b/src/Attribute/Property.php
@@ -17,9 +17,9 @@ public function __construct(
         public readonly PropertyType $type = PropertyType::STRING,
         public readonly ?Format $format = null,
         public readonly ?string $example = null,
-        public readonly bool $required = true,
+        bool $required = true,
     ) {
-        parent::__construct($name, $description);
+        parent::__construct($name, $description, $required);
     }
 
     public function toArray(): array
diff --git a/src/Attribute/PropertyArray.php b/src/Attribute/PropertyArray.php
index f78ffc9..3888c31 100644
--- a/src/Attribute/PropertyArray.php
+++ b/src/Attribute/PropertyArray.php
@@ -17,9 +17,9 @@ public function __construct(
         string $description = '',
         public readonly ?Format $format = null,
         public readonly ?string $example = null,
-        public readonly bool $required = true,
+        bool $required = true,
     ) {
-        parent::__construct($name, $description);
+        parent::__construct($name, $description, $required);
     }
 
     public function toArray(): array
diff --git a/src/Attribute/PropertyArrayObject.php b/src/Attribute/PropertyArrayObject.php
index 95b3a6c..287351c 100644
--- a/src/Attribute/PropertyArrayObject.php
+++ b/src/Attribute/PropertyArrayObject.php
@@ -16,9 +16,9 @@ public function __construct(
         string $description = '',
         public ?Format $format = null,
         public ?string $example = null,
-        public bool $required = true,
+        bool $required = true,
     ) {
-        parent::__construct($name, $description);
+        parent::__construct($name, $description, $required);
     }
 
     public function toArray(): array
diff --git a/src/Attribute/PropertyEnum.php b/src/Attribute/PropertyEnum.php
index 28737f0..8980e81 100644
--- a/src/Attribute/PropertyEnum.php
+++ b/src/Attribute/PropertyEnum.php
@@ -20,9 +20,9 @@ public function __construct(
         string $description = '',
         public ?Format $format = null,
         public ?string $example = null,
-        public bool $required = true,
+        bool $required = true,
     ) {
-        parent::__construct($name, $description);
+        parent::__construct($name, $description, $required);
     }
 
     public function toArray(): array
diff --git a/src/Attribute/PropertyObject.php b/src/Attribute/PropertyObject.php
index 1a4398e..1be5229 100644
--- a/src/Attribute/PropertyObject.php
+++ b/src/Attribute/PropertyObject.php
@@ -14,9 +14,9 @@ public function __construct(
         public readonly string $class,
         string $description = '',
         public readonly array $items = [],
-        public readonly bool $required = true,
+        bool $required = true,
     ) {
-        parent::__construct($name, $description);
+        parent::__construct($name, $description, $required);
     }
 
     public function toArray(): array
diff --git a/src/Generator/JsonGenerator.php b/src/Generator/JsonGenerator.php
index e1d51b1..22dc9a5 100644
--- a/src/Generator/JsonGenerator.php
+++ b/src/Generator/JsonGenerator.php
@@ -20,6 +20,6 @@ public function __construct(
      */
     public function generate(): string
     {
-        return json_encode($this->generator->generate(), JSON_THROW_ON_ERROR | JSON_FORCE_OBJECT);
+        return json_encode($this->generator->generate(), JSON_THROW_ON_ERROR);
     }
 }
diff --git a/src/Schema.php b/src/Schema.php
index 9a9dc36..d40eb83 100644
--- a/src/Schema.php
+++ b/src/Schema.php
@@ -9,6 +9,7 @@ class Schema
     public function render(array $document): array
     {
         $properties = [];
+        $required = [];
 
         foreach ($document['properties'] as $property) {
             $properties[$property['name']]['type'] = PropertyTypeTranslator::translate($property['type']);
@@ -24,12 +25,17 @@ public function render(array $document): array
             if (isset($property['example'])) {
                 $properties[$property['name']]['example'] = $property['example'];
             }
+
+            if (isset($property['required'])) {
+                $required[] = $property['name'];
+            }
         }
 
         $message[$document['name']] = [
             'payload' => [
                 'type' => 'object',
                 'properties' => $properties,
+                'required' => $required,
             ],
         ];
 
diff --git a/tests/Integration/DumpSpecificationConsoleTest.php b/tests/Integration/DumpSpecificationConsoleTest.php
index c80c930..130d3d9 100644
--- a/tests/Integration/DumpSpecificationConsoleTest.php
+++ b/tests/Integration/DumpSpecificationConsoleTest.php
@@ -50,6 +50,11 @@ public function testExecuteClass(): void
         description: 'Is user a citizen'
         format: boolean
         example: 'true'
+    required:
+      - name
+      - email
+      - age
+      - isCitizen
 
 
 YAML;
@@ -124,6 +129,11 @@ public function testExecuteYaml(): void
             description: 'Is user a citizen'
             format: boolean
             example: 'true'
+        required:
+          - name
+          - email
+          - age
+          - isCitizen
     PaymentExecuted:
       payload:
         type: object
@@ -138,6 +148,9 @@ public function testExecuteYaml(): void
             description: 'Creation date'
             format: date-time
             example: '2023-11-23 13:41:21'
+        required:
+          - amount
+          - createdAt
     ProductCreated:
       payload:
         type: object
@@ -170,6 +183,16 @@ public function testExecuteYaml(): void
           tags:
             type: string
             description: ''
+        required:
+          - id
+          - amount
+          - currency
+          - isPaid
+          - createdAt
+          - week
+          - payment
+          - products
+          - tags
 
 
 YAML;
@@ -269,7 +292,13 @@ public function testExecuteJson(): void
               "format": "boolean",
               "example": "true"
             }
-          }
+          },
+            "required": [
+                "name",
+                "email",
+                "age",
+                "isCitizen"
+            ]
         }
       },
       "PaymentExecuted": {
@@ -288,7 +317,11 @@ public function testExecuteJson(): void
               "format": "date-time",
               "example": "2023-11-23 13:41:21"
             }
-          }
+          },
+            "required": [
+                "amount",
+                "createdAt"
+            ]
         }
       },
       "ProductCreated": {
@@ -332,7 +365,18 @@ public function testExecuteJson(): void
               "type": "string",
               "description": ""
             }
-          }
+          },
+            "required": [
+                "id",
+                "amount",
+                "currency",
+                "isPaid",
+                "createdAt",
+                "week",
+                "payment",
+                "products",
+                "tags"
+            ]
         }
       }
     }
diff --git a/tests/Unit/Attribute/PropertyArrayObjectTest.php b/tests/Unit/Attribute/PropertyArrayObjectTest.php
index c7a23eb..cceaf28 100644
--- a/tests/Unit/Attribute/PropertyArrayObjectTest.php
+++ b/tests/Unit/Attribute/PropertyArrayObjectTest.php
@@ -20,6 +20,7 @@ public function testToArray(): void
             'type' => 'array',
             'format' => null,
             'example' => null,
+            'required' => true,
         ];
 
         $actual = $property->toArray();
diff --git a/tests/Unit/Attribute/PropertyArrayTest.php b/tests/Unit/Attribute/PropertyArrayTest.php
index de5939e..2dff8a7 100644
--- a/tests/Unit/Attribute/PropertyArrayTest.php
+++ b/tests/Unit/Attribute/PropertyArrayTest.php
@@ -24,6 +24,7 @@ public function testToArray(): void
             'itemsType' => 'string',
             'format' => null,
             'example' => null,
+            'required' => true,
         ];
 
         $actual = $property->toArray();
diff --git a/tests/Unit/Attribute/PropertyEnumTest.php b/tests/Unit/Attribute/PropertyEnumTest.php
index 5b844f7..1957a91 100644
--- a/tests/Unit/Attribute/PropertyEnumTest.php
+++ b/tests/Unit/Attribute/PropertyEnumTest.php
@@ -23,6 +23,7 @@ public function testToArrayOnBackedEnum(): void
             'enum' => [1, 2, 3, 4, 5, 6, 7],
             'format' => null,
             'example' => null,
+            'required' => true,
         ];
 
         $actual = $property->toArray();
diff --git a/tests/Unit/Attribute/PropertyObjectTest.php b/tests/Unit/Attribute/PropertyObjectTest.php
index 6cb9cc0..b26003c 100644
--- a/tests/Unit/Attribute/PropertyObjectTest.php
+++ b/tests/Unit/Attribute/PropertyObjectTest.php
@@ -21,6 +21,7 @@ public function testToArray(): void
             'description' => '',
             'type' => 'object',
             'items' => [],
+            'required' => true,
         ];
 
         $actual = $property->toArray();
@@ -47,8 +48,10 @@ class: Payment::class,
                     'type' => 'string',
                     'format' => null,
                     'example' => null,
+                    'required' => true,
                 ]
             ],
+            'required' => true,
         ];
 
         $actual = $property->toArray();
diff --git a/tests/Unit/Attribute/PropertyTest.php b/tests/Unit/Attribute/PropertyTest.php
index 227e58a..277d815 100644
--- a/tests/Unit/Attribute/PropertyTest.php
+++ b/tests/Unit/Attribute/PropertyTest.php
@@ -24,6 +24,7 @@ public function testToArray(): void
             'type' => 'string',
             'format' => null,
             'example' => null,
+            'required' => true,
         ];
 
         $actual = $property->toArray();
diff --git a/tests/Unit/DocumentationStrategy/AttributeDocumentationStrategyTest.php b/tests/Unit/DocumentationStrategy/AttributeDocumentationStrategyTest.php
index 5b3641d..8fe18ec 100644
--- a/tests/Unit/DocumentationStrategy/AttributeDocumentationStrategyTest.php
+++ b/tests/Unit/DocumentationStrategy/AttributeDocumentationStrategyTest.php
@@ -27,6 +27,7 @@ public function testUserSignedUp(): void
                     'description' => 'Name of the user',
                     'example' => 'John',
                     'format' => 'string',
+                    'required' => true,
                 ],
                 [
                     'name' => 'email',
@@ -34,6 +35,7 @@ public function testUserSignedUp(): void
                     'description' => 'Email of the user',
                     'format' => 'email',
                     'example' => 'john@example.com',
+                    'required' => true,
                 ],
                 [
                     'name' => 'age',
@@ -41,6 +43,7 @@ public function testUserSignedUp(): void
                     'description' => 'Age of the user',
                     'format' => 'int32',
                     'example' => '18',
+                    'required' => true,
                 ],
                 [
                     'name' => 'isCitizen',
@@ -48,6 +51,7 @@ public function testUserSignedUp(): void
                     'description' => 'Is user a citizen',
                     'format' => 'boolean',
                     'example' => 'true',
+                    'required' => true,
                 ],
             ],
         ];
@@ -70,6 +74,7 @@ public function testProductCreated(): void
                     'type' => 'integer',
                     'format' => null,
                     'example' => null,
+                    'required' => true,
                 ],
                 [
                     'name' => 'amount',
@@ -77,6 +82,7 @@ public function testProductCreated(): void
                     'type' => 'number',
                     'format' => null,
                     'example' => null,
+                    'required' => true,
                 ],
                 [
                     'name' => 'currency',
@@ -84,6 +90,7 @@ public function testProductCreated(): void
                     'type' => 'string',
                     'format' => null,
                     'example' => null,
+                    'required' => true,
                 ],
                 [
                     'name' => 'isPaid',
@@ -91,6 +98,7 @@ public function testProductCreated(): void
                     'type' => 'boolean',
                     'format' => null,
                     'example' => null,
+                    'required' => true,
                 ],
                 [
                     'name' => 'createdAt',
@@ -98,6 +106,7 @@ public function testProductCreated(): void
                     'type' => 'string',
                     'format' => 'date-time',
                     'example' => null,
+                    'required' => true,
                 ],
                 [
                     'name' => 'week',
@@ -106,12 +115,14 @@ public function testProductCreated(): void
                     'enum' => [1, 2, 3, 4, 5, 6, 7],
                     'format' => null,
                     'example' => null,
+                    'required' => true,
                 ],
                 [
                     'name' => 'payment',
                     'description' => '',
                     'type' => 'object',
                     'items' => [],
+                    'required' => true,
                 ],
                 [
                     'name' => 'products',
@@ -119,6 +130,7 @@ public function testProductCreated(): void
                     'type' => 'array',
                     'format' => null,
                     'example' => null,
+                    'required' => true,
                 ],
                 [
                     'name' => 'tags',
@@ -127,6 +139,7 @@ public function testProductCreated(): void
                     'format' => null,
                     'example' => null,
                     'itemsType' => 'string',
+                    'required' => true,
                 ],
             ],
         ];
diff --git a/tests/Unit/SchemaTest.php b/tests/Unit/SchemaTest.php
index c4a4580..80d1fcf 100644
--- a/tests/Unit/SchemaTest.php
+++ b/tests/Unit/SchemaTest.php
@@ -18,18 +18,22 @@ public function testReflection(): void
                 [
                     'name' => 'name',
                     'type' => 'string',
+                    'required' => true,
                 ],
                 [
                     'name' => 'email',
                     'type' => 'string',
+                    'required' => true,
                 ],
                 [
                     'name' => 'age',
                     'type' => 'int',
+                    'required' => true,
                 ],
                 [
                     'name' => 'isCitizen',
                     'type' => 'bool',
+                    'required' => true,
                 ],
             ],
         ];
@@ -51,6 +55,11 @@ public function testReflection(): void
         type: integer
       isCitizen:
         type: boolean
+    required:
+      - name
+      - email
+      - age
+      - isCitizen
 
 YAML;
 
@@ -68,6 +77,7 @@ public function testAttributes(): void
                     'description' => 'Name of the user',
                     'example' => 'John',
                     'format' => 'string',
+                    'required' => true,
                 ],
                 [
                     'name' => 'email',
@@ -75,6 +85,7 @@ public function testAttributes(): void
                     'description' => 'Email of the user',
                     'format' => 'email',
                     'example' => 'john@example.com',
+                    'required' => true,
                 ],
                 [
                     'name' => 'age',
@@ -82,6 +93,7 @@ public function testAttributes(): void
                     'description' => 'Age of the user',
                     'format' => 'int',
                     'example' => '18',
+                    'required' => true,
                 ],
                 [
                     'name' => 'isCitizen',
@@ -89,6 +101,7 @@ public function testAttributes(): void
                     'description' => 'Is user a citizen',
                     'format' => 'boolean',
                     'example' => 'true',
+                    'required' => true,
                 ],
             ],
         ];
@@ -122,6 +135,11 @@ public function testAttributes(): void
         description: 'Is user a citizen'
         format: boolean
         example: 'true'
+    required:
+      - name
+      - email
+      - age
+      - isCitizen
 
 YAML;
 
diff --git a/tests/Unit/Symfony/Controller/JsonSpecificationControllerTest.php b/tests/Unit/Symfony/Controller/JsonSpecificationControllerTest.php
index 557cb09..0151d33 100644
--- a/tests/Unit/Symfony/Controller/JsonSpecificationControllerTest.php
+++ b/tests/Unit/Symfony/Controller/JsonSpecificationControllerTest.php
@@ -45,7 +45,7 @@ public function test(): void
     "version": "1.2.3",
     "description": "This service is in charge of processing user signups"
   },
-  "servers": {},
+  "servers": [],
   "channels": {
     "user_signed_up": {
       "subscribe": {
@@ -99,7 +99,13 @@ public function test(): void
               "format": "boolean",
               "example": "true"
             }
-          }
+          },
+            "required": [
+                "name",
+                "email",
+                "age",
+                "isCitizen"
+            ]
         }
       },
       "PaymentExecuted": {
@@ -118,7 +124,11 @@ public function test(): void
               "format": "date-time",
               "example": "2023-11-23 13:41:21"
             }
-          }
+          },
+            "required": [
+                "amount",
+                "createdAt"
+            ]
         }
       },
       "ProductCreated": {
@@ -162,7 +172,18 @@ public function test(): void
               "type": "string",
               "description": ""
             }
-          }
+          },
+            "required": [
+                "id",
+                "amount",
+                "currency",
+                "isPaid",
+                "createdAt",
+                "week",
+                "payment",
+                "products",
+                "tags"
+            ]
         }
       }
     }
diff --git a/tests/Unit/Symfony/Controller/YamlSpecificationControllerTest.php b/tests/Unit/Symfony/Controller/YamlSpecificationControllerTest.php
index 1a9db67..270cc48 100644
--- a/tests/Unit/Symfony/Controller/YamlSpecificationControllerTest.php
+++ b/tests/Unit/Symfony/Controller/YamlSpecificationControllerTest.php
@@ -83,6 +83,11 @@ public function test(): void
             description: 'Is user a citizen'
             format: boolean
             example: 'true'
+        required:
+          - name
+          - email
+          - age
+          - isCitizen
     PaymentExecuted:
       payload:
         type: object
@@ -97,6 +102,9 @@ public function test(): void
             description: 'Creation date'
             format: date-time
             example: '2023-11-23 13:41:21'
+        required:
+          - amount
+          - createdAt
     ProductCreated:
       payload:
         type: object
@@ -129,6 +137,16 @@ public function test(): void
           tags:
             type: string
             description: ''
+        required:
+          - id
+          - amount
+          - currency
+          - isPaid
+          - createdAt
+          - week
+          - payment
+          - products
+          - tags
 
 YAML;