diff --git a/ModelDescriber/Annotations/AnnotationsReader.php b/ModelDescriber/Annotations/AnnotationsReader.php
index 294d62c..ed0f5e6 100644
--- a/ModelDescriber/Annotations/AnnotationsReader.php
+++ b/ModelDescriber/Annotations/AnnotationsReader.php
@@ -23,6 +23,7 @@ class AnnotationsReader
 
     private $phpDocReader;
     private $swgAnnotationsReader;
+    private $symfonyConstraintAnnotationReader;
 
     public function __construct(Reader $annotationsReader)
     {
@@ -30,16 +31,19 @@ class AnnotationsReader
 
         $this->phpDocReader = new PropertyPhpDocReader();
         $this->swgAnnotationsReader = new SwgAnnotationsReader($annotationsReader);
+        $this->symfonyConstraintAnnotationReader = new SymfonyConstraintAnnotationReader($annotationsReader);
     }
 
     public function updateDefinition(\ReflectionClass $reflectionClass, Schema $schema)
     {
         $this->swgAnnotationsReader->updateDefinition($reflectionClass, $schema);
+        $this->symfonyConstraintAnnotationReader->setSchema($schema);
     }
 
     public function updateProperty(\ReflectionProperty $reflectionProperty, Schema $property)
     {
         $this->phpDocReader->updateProperty($reflectionProperty, $property);
         $this->swgAnnotationsReader->updateProperty($reflectionProperty, $property);
+        $this->symfonyConstraintAnnotationReader->updateProperty($reflectionProperty, $property);
     }
 }
diff --git a/ModelDescriber/Annotations/SymfonyConstraintAnnotationReader.php b/ModelDescriber/Annotations/SymfonyConstraintAnnotationReader.php
new file mode 100644
index 0000000..fac864d
--- /dev/null
+++ b/ModelDescriber/Annotations/SymfonyConstraintAnnotationReader.php
@@ -0,0 +1,115 @@
+<?php
+
+/*
+ * This file is part of the NelmioApiDocBundle package.
+ *
+ * (c) Nelmio
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Nelmio\ApiDocBundle\ModelDescriber\Annotations;
+
+use Doctrine\Common\Annotations\Reader;
+use EXSyst\Component\Swagger\Schema;
+use ReflectionProperty;
+use Symfony\Component\Validator\Constraints as Assert;
+
+/**
+ * @internal
+ */
+class SymfonyConstraintAnnotationReader
+{
+    /**
+     * @var Reader
+     */
+    private $annotationsReader;
+
+    /**
+     * @var Schema
+     */
+    private $schema;
+
+    public function __construct(Reader $annotationsReader)
+    {
+        $this->annotationsReader = $annotationsReader;
+    }
+
+    /**
+     * Update the given property and schema with defined Symfony constraints.
+     */
+    public function updateProperty(ReflectionProperty $reflectionProperty, Schema $property)
+    {
+        $annotations = $this->annotationsReader->getPropertyAnnotations($reflectionProperty);
+
+        foreach ($annotations as $annotation) {
+            if ($annotation instanceof Assert\NotBlank || $annotation instanceof Assert\NotNull) {
+                $this->updateSchemaDefinitionWithRequiredProperty($reflectionProperty);
+            }
+
+            if ($annotation instanceof Assert\Length) {
+                if ($annotation->min > 0) {
+                    $this->updateSchemaDefinitionWithRequiredProperty($reflectionProperty);
+                }
+
+                $property->setMinLength($annotation->min);
+                $property->setMaxLength($annotation->max);
+            }
+
+            if ($annotation instanceof Assert\Regex) {
+                $this->appendPattern($property, $annotation->getHtmlPattern());
+            }
+
+            if ($annotation instanceof Assert\DateTime) {
+                $this->appendPattern($property, $annotation->format);
+            }
+
+            if ($annotation instanceof Assert\Count) {
+                $property->setMinItems($annotation->min);
+                $property->setMaxItems($annotation->max);
+            }
+
+            if ($annotation instanceof Assert\Choice) {
+                $property->setEnum($annotation->choices);
+            }
+
+            if ($annotation instanceof Assert\Expression) {
+                $this->appendPattern($property, $annotation->message);
+            }
+        }
+    }
+
+    public function setSchema($schema)
+    {
+        $this->schema = $schema;
+    }
+
+    /**
+     * Set the required properties on the scheme.
+     */
+    private function updateSchemaDefinitionWithRequiredProperty(ReflectionProperty $reflectionProperty)
+    {
+        if (null === $this->schema) {
+            return;
+        }
+
+        $existingRequiredFields = $this->schema->getRequired() ?? [];
+
+        $existingRequiredFields[] = $reflectionProperty->getName();
+
+        $this->schema->setRequired(array_unique($existingRequiredFields));
+    }
+
+    /**
+     * Append the pattern from the constraint to the existing pattern.
+     */
+    private function appendPattern(Schema $property, string $newPattern)
+    {
+        if (null !== $property->getPattern()) {
+            $property->setPattern(sprintf('%s, %s', $property->getPattern(), $newPattern));
+        } else {
+            $property->setPattern($newPattern);
+        }
+    }
+}
diff --git a/Tests/Functional/Entity/JMSUser.php b/Tests/Functional/Entity/JMSUser.php
index 7a7dc7e..7eb5cab 100644
--- a/Tests/Functional/Entity/JMSUser.php
+++ b/Tests/Functional/Entity/JMSUser.php
@@ -13,6 +13,7 @@ namespace Nelmio\ApiDocBundle\Tests\Functional\Entity;
 
 use JMS\Serializer\Annotation as Serializer;
 use Swagger\Annotations as SWG;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * User.
@@ -27,6 +28,8 @@ class JMSUser
      * @Serializer\Groups({"list"})
      *
      * @SWG\Property(description = "User id", readOnly = true, title = "userid", example=1, default = null)
+     *
+     * @Assert\NotBlank()
      */
     private $id;
 
diff --git a/Tests/Functional/JMSFunctionalTest.php b/Tests/Functional/JMSFunctionalTest.php
index 9304a78..73b3035 100644
--- a/Tests/Functional/JMSFunctionalTest.php
+++ b/Tests/Functional/JMSFunctionalTest.php
@@ -67,6 +67,9 @@ class JMSFunctionalTest extends WebTestCase
                     'type' => 'date',
                 ],
             ],
+            'required' => [
+                'id',
+            ],
         ], $this->getModel('JMSUser')->toArray());
     }
 
@@ -96,6 +99,9 @@ class JMSFunctionalTest extends WebTestCase
                     'example' => '1',
                 ],
             ],
+            'required' => [
+                'id',
+            ],
         ], $this->getModel('JMSUser2')->toArray());
     }