diff --git a/src/OpenApi/Model/Components.php b/src/OpenApi/Model/Components.php
index 1035ab1d7f0..75cd874a8e5 100644
--- a/src/OpenApi/Model/Components.php
+++ b/src/OpenApi/Model/Components.php
@@ -29,6 +29,10 @@ final class Components
 
     public function __construct(\ArrayObject $schemas = null, \ArrayObject $responses = null, \ArrayObject $parameters = null, \ArrayObject $examples = null, \ArrayObject $requestBodies = null, \ArrayObject $headers = null, \ArrayObject $securitySchemes = null, \ArrayObject $links = null, \ArrayObject $callbacks = null)
     {
+        if ($schemas) {
+            $schemas->ksort();
+        }
+
         $this->schemas = $schemas;
         $this->responses = $responses;
         $this->parameters = $parameters;
diff --git a/src/OpenApi/Model/Paths.php b/src/OpenApi/Model/Paths.php
index 80829b3d876..efaa04a8e8a 100644
--- a/src/OpenApi/Model/Paths.php
+++ b/src/OpenApi/Model/Paths.php
@@ -20,6 +20,8 @@ final class Paths
     public function addPath(string $path, PathItem $pathItem)
     {
         $this->paths[$path] = $pathItem;
+
+        ksort($this->paths);
     }
 
     public function getPath(string $path): ?PathItem
diff --git a/src/OpenApi/Serializer/OpenApiNormalizer.php b/src/OpenApi/Serializer/OpenApiNormalizer.php
index ba6a80abfb9..db37bffbb2a 100644
--- a/src/OpenApi/Serializer/OpenApiNormalizer.php
+++ b/src/OpenApi/Serializer/OpenApiNormalizer.php
@@ -13,6 +13,7 @@
 
 namespace ApiPlatform\Core\OpenApi\Serializer;
 
+use ApiPlatform\Core\OpenApi\Model\Paths;
 use ApiPlatform\Core\OpenApi\OpenApi;
 use Symfony\Component\Serializer\Normalizer\AbstractObjectNormalizer;
 use Symfony\Component\Serializer\Normalizer\CacheableSupportsMethodInterface;
@@ -38,8 +39,14 @@ public function __construct(NormalizerInterface $decorated)
      */
     public function normalize($object, $format = null, array $context = []): array
     {
+        $pathsCallback = static function ($innerObject) {
+            return $innerObject instanceof Paths ? $innerObject->getPaths() : [];
+        };
         $context[AbstractObjectNormalizer::PRESERVE_EMPTY_OBJECTS] = true;
         $context[AbstractObjectNormalizer::SKIP_NULL_VALUES] = true;
+        $context[AbstractObjectNormalizer::CALLBACKS] = [
+            'paths' => $pathsCallback,
+        ];
 
         return $this->recursiveClean($this->decorated->normalize($object, $format, $context));
     }
@@ -54,23 +61,8 @@ private function recursiveClean($data): array
                 continue;
             }
 
-            if ('schemas' === $key && \is_array($value)) {
-                ksort($value);
-            }
-
-            // Side effect of using getPaths(): Paths which itself contains the array
-            if ('paths' === $key) {
-                $value = $data['paths'] = $data['paths']['paths'];
-                if ($value) {
-                    ksort($value);
-                }
-                unset($data['paths']['paths']);
-            }
-
             if (\is_array($value)) {
                 $data[$key] = $this->recursiveClean($value);
-                // arrays must stay even if empty
-                continue;
             }
         }
 
diff --git a/tests/OpenApi/Serializer/OpenApiNormalizerTest.php b/tests/OpenApi/Serializer/OpenApiNormalizerTest.php
index f2ea35be85f..1227647c7a2 100644
--- a/tests/OpenApi/Serializer/OpenApiNormalizerTest.php
+++ b/tests/OpenApi/Serializer/OpenApiNormalizerTest.php
@@ -60,7 +60,7 @@ public function testNormalize()
         $resourceNameCollectionFactoryProphecy->create()->shouldBeCalled()->willReturn(new ResourceNameCollection([Dummy::class, 'Zorro']));
         $defaultContext = ['base_url' => '/app_dev.php/'];
         $propertyNameCollectionFactoryProphecy = $this->prophesize(PropertyNameCollectionFactoryInterface::class);
-        $propertyNameCollectionFactoryProphecy->create(Dummy::class, Argument::any())->shouldBeCalled()->willReturn(new PropertyNameCollection(['id', 'name', 'description', 'dummyDate']));
+        $propertyNameCollectionFactoryProphecy->create(Dummy::class, Argument::any())->shouldBeCalled()->willReturn(new PropertyNameCollection(['id', 'name', 'description', 'dummyDate', 'paths']));
         $propertyNameCollectionFactoryProphecy->create('Zorro', Argument::any())->shouldBeCalled()->willReturn(new PropertyNameCollection(['id']));
 
         $dummyMetadata = new ResourceMetadata(
@@ -104,6 +104,8 @@ public function testNormalize()
         $propertyMetadataFactoryProphecy->create(Dummy::class, 'name', Argument::any())->shouldBeCalled()->willReturn(new PropertyMetadata(new Type(Type::BUILTIN_TYPE_STRING), 'This is a name.', true, true, true, true, false, false, null, null, [], null, null, null, null, ['minLength' => 3, 'maxLength' => 20, 'pattern' => '^dummyPattern$']));
         $propertyMetadataFactoryProphecy->create(Dummy::class, 'description', Argument::any())->shouldBeCalled()->willReturn(new PropertyMetadata(new Type(Type::BUILTIN_TYPE_STRING), 'This is an initializable but not writable property.', true, false, true, true, false, false, null, null, [], null, true));
         $propertyMetadataFactoryProphecy->create(Dummy::class, 'dummyDate', Argument::any())->shouldBeCalled()->willReturn(new PropertyMetadata(new Type(Type::BUILTIN_TYPE_OBJECT, true, \DateTime::class), 'This is a \DateTimeInterface object.', true, true, true, true, false, false, null, null, []));
+        // Check reserved word "paths": when normalize->recursiveClean in OpenApi Component Schema.
+        $propertyMetadataFactoryProphecy->create(Dummy::class, 'paths', Argument::any())->shouldBeCalled()->willReturn(new PropertyMetadata(new Type(Type::BUILTIN_TYPE_ARRAY), 'This is a array.', true, true, true, true, false, false, null, null, []));
 
         $propertyMetadataFactoryProphecy->create('Zorro', 'id', Argument::any())->shouldBeCalled()->willReturn(new PropertyMetadata(new Type(Type::BUILTIN_TYPE_INT), 'This is an id.', true, false, null, null, null, true));