diff --git a/src/Limenius/Liform/Transformer/CompoundTransformer.php b/src/Limenius/Liform/Transformer/CompoundTransformer.php
index d8865d5..309f049 100644
--- a/src/Limenius/Liform/Transformer/CompoundTransformer.php
+++ b/src/Limenius/Liform/Transformer/CompoundTransformer.php
@@ -46,7 +46,12 @@ public function transform(FormInterface $form, array $extensions = [], $widget =
         $order = 1;
         $required = [];
 
-        foreach ($form->all() as $name => $field) {
+        $formItems = $form->all();
+        uasort($formItems, static function ($a, $b): int {
+            return $a->getConfig()->getOption('priority') <=> $b->getConfig()->getOption('priority');
+        });
+
+        foreach ($formItems as $name => $field) {
             $transformerData = $this->resolver->resolve($field);
             $transformedChild = $transformerData['transformer']->transform($field, $extensions, $transformerData['widget']);
             $transformedChild['propertyOrder'] = $order;
diff --git a/tests/Limenius/Liform/Tests/Transformer/CompoundTransformerTest.php b/tests/Limenius/Liform/Tests/Transformer/CompoundTransformerTest.php
index da41067..5701335 100644
--- a/tests/Limenius/Liform/Tests/Transformer/CompoundTransformerTest.php
+++ b/tests/Limenius/Liform/Tests/Transformer/CompoundTransformerTest.php
@@ -11,17 +11,13 @@
 
 namespace Limenius\Liform\Tests\Transformer;
 
-use Symfony\Component\Form\FormBuilder;
-use Symfony\Component\EventDispatcher\EventDispatcher;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\Form\Tests\AbstractFormTest;
-use Symfony\Component\Form\Extension\Core\Type\TextType;
-use Symfony\Component\Form\Extension\Core\Type\FormType;
-
-use Limenius\Liform\Transformer\CompoundTransformer;
-use Limenius\Liform\Transformer\StringTransformer;
 use Limenius\Liform\Resolver;
 use Limenius\Liform\Tests\LiformTestCase;
+use Limenius\Liform\Transformer\CompoundTransformer;
+use Limenius\Liform\Transformer\StringTransformer;
+use Symfony\Component\Form\Extension\Core\Type\FormType;
+use Symfony\Component\Form\Extension\Core\Type\TextType;
+use Symfony\Component\Form\Tests\AbstractFormTest;
 
 /**
  * @author Nacho Martín <nacho@limenius.com>
@@ -39,8 +35,64 @@ public function testOrder()
         $resolver->setTransformer('text', new StringTransformer($this->translator));
         $transformer = new CompoundTransformer($this->translator, null, $resolver);
         $transformed = $transformer->transform($form);
-        $this->assertTrue(is_array($transformed));
-        $this->assertEquals(1, $transformed['properties']['firstName']['propertyOrder']);
-        $this->assertEquals(2, $transformed['properties']['secondName']['propertyOrder']);
+
+        $this->assertSame(
+            [
+                'title' => null,
+                'type' => 'object',
+                'properties' => [
+                    'firstName' => [
+                        'type' => 'string',
+                        'title' => null,
+                        'propertyOrder' => 1,
+                    ],
+                    'secondName' => [
+                        'type' => 'string',
+                        'title' => null,
+                        'propertyOrder' => 2,
+                    ],
+                ],
+                'required' => [
+                    'firstName',
+                    'secondName',
+                ],
+            ],
+            $transformed
+        );
+    }
+
+    public function testPriority()
+    {
+        $form = $this->factory->create(FormType::class)
+            ->add('firstName', TextType::class, ['priority' => 1])
+            ->add('secondName', TextType::class, ['priority' => 0]);
+        $resolver = new Resolver();
+        $resolver->setTransformer('text', new StringTransformer($this->translator));
+        $transformer = new CompoundTransformer($this->translator, null, $resolver);
+        $transformed = $transformer->transform($form);
+
+        $this->assertSame(
+            [
+                'title' => null,
+                'type' => 'object',
+                'properties' => [
+                    'secondName' => [
+                        'type' => 'string',
+                        'title' => null,
+                        'propertyOrder' => 1,
+                    ],
+                    'firstName' => [
+                        'type' => 'string',
+                        'title' => null,
+                        'propertyOrder' => 2,
+                    ],
+                ],
+                'required' => [
+                    'secondName',
+                    'firstName',
+                ],
+            ],
+            $transformed
+        );
     }
 }