diff --git a/Controller/CaptchaController.php b/Controller/CaptchaController.php
index acdfa48..345e447 100644
--- a/Controller/CaptchaController.php
+++ b/Controller/CaptchaController.php
@@ -2,9 +2,9 @@
 
 namespace Gregwar\CaptchaBundle\Controller;
 
-use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
  * Generates a captcha via a URL
@@ -16,12 +16,13 @@ class CaptchaController extends Controller
     /**
      * Action that is used to generate the captcha, save its code, and stream the image
      *
-     * @param \Symfony\Component\HttpFoundation\Request $request
      * @param string $key
      *
-     * @return \Symfony\Component\HttpFoundation\Response
+     * @return Response
+     *
+     * @throws NotFoundHttpException
      */
-    public function generateCaptchaAction(Request $request, $key)
+    public function generateCaptchaAction($key)
     {
         $options = $this->container->getParameter('gregwar_captcha.config');
         $session = $this->get('session');
@@ -52,8 +53,9 @@ class CaptchaController extends Controller
 
         $response = new Response($generator->generate($options));
         $response->headers->set('Content-type', 'image/jpeg');
+        $response->headers->set('Pragma', 'no-cache');
+        $response->headers->set('Cache-Control','no-cache');
 
         return $response;
     }
 }
-
diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 1f8abd6..a415275 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -53,4 +53,3 @@ class Configuration implements ConfigurationInterface
         return $treeBuilder;
     }
 }
-
diff --git a/Generator/CaptchaGenerator.php b/Generator/CaptchaGenerator.php
index 9e9e302..06fe4d1 100644
--- a/Generator/CaptchaGenerator.php
+++ b/Generator/CaptchaGenerator.php
@@ -166,4 +166,3 @@ class CaptchaGenerator
         return $phrase;
     }
 }
-
diff --git a/Generator/ImageFileHandler.php b/Generator/ImageFileHandler.php
index 1a47420..71dda0f 100644
--- a/Generator/ImageFileHandler.php
+++ b/Generator/ImageFileHandler.php
@@ -103,4 +103,3 @@ class ImageFileHandler
         }
     }
 }
-
diff --git a/README.md b/README.md
index 2123d64..67c0cfe 100644
--- a/README.md
+++ b/README.md
@@ -126,7 +126,7 @@ You can define the following configuration options globally or on the CaptchaTyp
 * **disabled**: disable globally the CAPTCHAs (can be useful in dev environment), it will
   still appear but won't be editable and won't be checked
 * **length**: the length of the captcha (number of chars, default 5)
-* **quality**: jpeg quality of captchas (default=15)
+* **quality**: jpeg quality of captchas (default=30)
 * **charset**: the charset used for code generation (default=abcdefhjkmnprstuvwxyz23456789)
 * **font**: the font to use (default is random among some pre-provided fonts), this should be an absolute path
 * **keep_value**: the value will be the same until the form is posted, even if the page is refreshed (default=true)
diff --git a/Resources/config/services.yml b/Resources/config/services.yml
index 64827f0..7b552ca 100755
--- a/Resources/config/services.yml
+++ b/Resources/config/services.yml
@@ -1,6 +1,13 @@
+parameters:
+    gregwar_captcha.captcha_type.class: Gregwar\CaptchaBundle\Type\CaptchaType
+    gregwar_captcha.captcha_generator.class: Gregwar\CaptchaBundle\Generator\CaptchaGenerator
+    gregwar_captcha.image_file_handler.class: Gregwar\CaptchaBundle\Generator\ImageFileHandler
+    gregwar_captcha.captcha_builder.class: Gregwar\Captcha\CaptchaBuilder
+    gregwar_captcha.phrase_builder.class: Gregwar\Captcha\PhraseBuilder
+    
 services:
     captcha.type:
-        class: Gregwar\CaptchaBundle\Type\CaptchaType
+        class: %gregwar_captcha.captcha_type.class%
         arguments:
             - @session
             - @gregwar_captcha.generator
@@ -10,7 +17,7 @@ services:
             - { name: form.type, alias: captcha }
 
     gregwar_captcha.generator:
-        class: Gregwar\CaptchaBundle\Generator\CaptchaGenerator
+        class: %gregwar_captcha.captcha_generator.class%
         arguments:
             - @router
             - @gregwar_captcha.captcha_builder
@@ -18,7 +25,7 @@ services:
             - @gregwar_captcha.image_file_handler
 
     gregwar_captcha.image_file_handler:
-        class: Gregwar\CaptchaBundle\Generator\ImageFileHandler
+        class: %gregwar_captcha.image_file_handler.class%
         arguments:
             - %gregwar_captcha.config.image_folder%
             - %gregwar_captcha.config.web_path%
@@ -26,7 +33,7 @@ services:
             - %gregwar_captcha.config.expiration%
 
     gregwar_captcha.captcha_builder:
-        class: Gregwar\Captcha\CaptchaBuilder
+        class: %gregwar_captcha.captcha_builder.class%
 
     gregwar_captcha.phrase_builder:
-        class: Gregwar\Captcha\PhraseBuilder
+        class: %gregwar_captcha.phrase_builder.class%
diff --git a/Resources/translations/gregwar_captcha.bg.yml b/Resources/translations/gregwar_captcha.bg.yml
new file mode 100644
index 0000000..c721782
--- /dev/null
+++ b/Resources/translations/gregwar_captcha.bg.yml
@@ -0,0 +1 @@
+Renew: Обнови
diff --git a/Resources/translations/gregwar_captcha.pl.yml b/Resources/translations/gregwar_captcha.pl.yml
new file mode 100644
index 0000000..00473ad
--- /dev/null
+++ b/Resources/translations/gregwar_captcha.pl.yml
@@ -0,0 +1 @@
+Renew: Przeładuj
diff --git a/Resources/translations/validators.bg.yml b/Resources/translations/validators.bg.yml
new file mode 100644
index 0000000..5eb0d66
--- /dev/null
+++ b/Resources/translations/validators.bg.yml
@@ -0,0 +1 @@
+Bad code value: Грешен код
diff --git a/Resources/translations/validators.pl.yml b/Resources/translations/validators.pl.yml
new file mode 100644
index 0000000..b053feb
--- /dev/null
+++ b/Resources/translations/validators.pl.yml
@@ -0,0 +1 @@
+Bad code value: Kod jest niepoprawny
diff --git a/Type/CaptchaType.php b/Type/CaptchaType.php
index 2b10374..17b4e2f 100644
--- a/Type/CaptchaType.php
+++ b/Type/CaptchaType.php
@@ -22,18 +22,12 @@ use Gregwar\CaptchaBundle\Generator\CaptchaGenerator;
 class CaptchaType extends AbstractType
 {
     /**
-     * @var \Symfony\Component\HttpFoundation\Session\SessionInterface
+     * @var SessionInterface
      */
     protected $session;
 
     /**
-     * The session key
-     * @var string
-     */
-    protected $key = null;
-
-    /**
-     * @var \Gregwar\CaptchaBundle\Generator\CaptchaGenerator
+     * @var CaptchaGenerator
      */
     protected $generator;
 
@@ -49,9 +43,10 @@ class CaptchaType extends AbstractType
     private $options = array();
 
     /**
-     * @param \Symfony\Component\HttpFoundation\Session\SessionInterface $session
-     * @param \Gregwar\CaptchaBundle\Generator\CaptchaGenerator $generator
-     * @param array $options
+     * @param SessionInterface    $session
+     * @param CaptchaGenerator    $generator
+     * @param TranslatorInterface $translator
+     * @param array               $options
      */
     public function __construct(SessionInterface $session, CaptchaGenerator $generator, TranslatorInterface $translator, $options)
     {
@@ -62,17 +57,14 @@ class CaptchaType extends AbstractType
     }
 
     /**
-     * @param \Symfony\Component\Form\FormBuilderInterface $builder
-     * @param array $options
+     * {@inheritdoc}
      */
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
-        $this->key = 'gcb_'.$builder->getForm()->getName();
-
         $validator = new CaptchaValidator(
             $this->translator,
             $this->session,
-            $this->key,
+            sprintf('gcb_%s', $builder->getForm()->getName()),
             $options['invalid_message'],
             $options['bypass_code'],
             $options['humanity']
@@ -82,33 +74,31 @@ class CaptchaType extends AbstractType
     }
 
     /**
-     * @param \Symfony\Component\Form\FormView $view
-     * @param \Symfony\Component\Form\FormInterface $form
-     * @param array $options
+     * {@inheritdoc}
      */
     public function buildView(FormView $view, FormInterface $form, array $options)
     {
-        $isHuman = false;
-
         if ($options['reload'] && !$options['as_url']) {
             throw new \InvalidArgumentException('GregwarCaptcha: The reload option cannot be set without as_url, see the README for more information');
         }
 
+        $sessionKey = sprintf('gcb_%s', $form->getName());
+        $isHuman    = false;
+
         if ($options['humanity'] > 0) {
-            $humanityKey = $this->key.'_humanity';
+            $humanityKey = sprintf('%s_humanity', $sessionKey);
             if ($this->session->get($humanityKey, 0) > 0) {
                 $isHuman = true;
             }
         }
 
         if ($options['as_url']) {
-            $key = $this->key;
             $keys = $this->session->get($options['whitelist_key'], array());
-            if (!in_array($key, $keys)) {
-                $keys[] = $key;
+            if (!in_array($sessionKey, $keys)) {
+                $keys[] = $sessionKey;
             }
             $this->session->set($options['whitelist_key'], $keys);
-            $options['session_key'] = $this->key;
+            $options['session_key'] = $sessionKey;
         }
 
         $view->vars = array_merge($view->vars, array(
@@ -122,15 +112,15 @@ class CaptchaType extends AbstractType
         ));
 
         $persistOptions = array();
-        foreach (array('phrase', 'width', 'height', 'distortion', 'length', 'quality') as $key) {
+        foreach (array('phrase', 'width', 'height', 'distortion', 'length', 'quality', 'background_color', 'text_color') as $key) {
             $persistOptions[$key] = $options[$key];
         }
 
-        $this->session->set($this->key, $persistOptions);
+        $this->session->set($sessionKey, $persistOptions);
     }
 
     /**
-     * @param \Symfony\Component\OptionsResolver\OptionsResolverInterface $resolver
+     * {@inheritdoc}
      */
     public function setDefaultOptions(OptionsResolverInterface $resolver)
     {
diff --git a/Validator/CaptchaValidator.php b/Validator/CaptchaValidator.php
index 6e498d9..4469cec 100644
--- a/Validator/CaptchaValidator.php
+++ b/Validator/CaptchaValidator.php
@@ -15,7 +15,7 @@ use Symfony\Component\Translation\TranslatorInterface;
 class CaptchaValidator
 {
     /**
-     * @var \Symfony\Component\HttpFoundation\Session\SessionInterface
+     * @var SessionInterface
      */
     private $session;
 
@@ -47,10 +47,12 @@ class CaptchaValidator
     private $translator;
 
     /**
-     * @param \Symfony\Component\HttpFoundation\Session\SessionInterface $session
-     * @param string $key
-     * @param string $invalidMessage
-     * @param string|null $bypassCode
+     * @param TranslatorInterface $translator
+     * @param SessionInterface    $session
+     * @param string              $key
+     * @param string              $invalidMessage
+     * @param string              $bypassCode
+     * @param int                 $humanity
      */
     public function __construct(TranslatorInterface $translator, SessionInterface $session, $key, $invalidMessage, $bypassCode, $humanity)
     {
@@ -67,7 +69,7 @@ class CaptchaValidator
      */
     public function validate(FormEvent $event)
     {
-        $form = $form = $event->getForm();
+        $form = $event->getForm();
 
         $code = $form->getData();
         $expectedCode = $this->getExpectedCode();
@@ -112,7 +114,7 @@ class CaptchaValidator
     }
 
     /**
-     * Retreive the humanity
+     * Retrieve the humanity
      *
      * @return mixed|null
      */
diff --git a/composer.json b/composer.json
index 81abbee..f466389 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,9 @@
     ],
     "require": {
         "php": ">=5.3.0",
-        "gregwar/captcha": "v1.0.11"
+        "gregwar/captcha": "~1.0.11",
+        "symfony/framework-bundle": "~2.1",
+        "symfony/form": "~2.1"
     },
     "autoload": {
         "psr-0": {