diff --git a/README.md b/README.md
index 7b72ce7..19d0255 100644
--- a/README.md
+++ b/README.md
@@ -105,6 +105,8 @@ You can use the "captcha" type in your forms this way:
     use Gregwar\CaptchaBundle\Type\CaptchaType;
     // ...
     $builder->add('captcha', CaptchaType::class); // That's all !
+    // If you're using php<5.5, you can use instead:
+    $builder->add('captcha', 'Gregwar\CaptchaBundle\Type\CaptchaType');
     // ...
 ```
 
diff --git a/Type/CaptchaType.php b/Type/CaptchaType.php
index 0da5afb..3e57168 100644
--- a/Type/CaptchaType.php
+++ b/Type/CaptchaType.php
@@ -11,7 +11,6 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
 use Symfony\Component\OptionsResolver\OptionsResolverInterface;
 use Symfony\Component\Form\FormEvents;
 use Symfony\Component\Translation\TranslatorInterface;
-use Symfony\Component\Form\Extension\Core\Type\TextType;
 
 use Gregwar\CaptchaBundle\Validator\CaptchaValidator;
 use Gregwar\CaptchaBundle\Generator\CaptchaGenerator;
@@ -144,7 +143,8 @@ class CaptchaType extends AbstractType
      */
     public function getParent()
     {
-        return TextType::class;
+        // Not using ::class to support Symfony 2.8 w/ php<5.5
+        return 'Symfony\Component\Form\Extension\Core\Type\TextType';
     }
 
     /**
diff --git a/composer.json b/composer.json
index 537f07b..8ad3bf3 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
         }
     ],
     "require": {
-        "php": ">=5.5.0",
+        "php": ">=5.3.9",
         "gregwar/captcha": "~1.1",
         "symfony/framework-bundle": "~2.1|~3.0",
         "symfony/form": "~2.1|~3.0"