diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
new file mode 100644
index 0000000..5b4324b
--- /dev/null
+++ b/DependencyInjection/Configuration.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace Gregwar\CaptchaBundle\DependencyInjection;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class Configuration implements ConfigurationInterface
+{
+    /**
+     * Generates the configuration tree.
+     * @return TreeBuilder
+     */
+    public function getConfigTreeBuilder()
+    {
+        $treeBuilder = new TreeBuilder();
+        $rootNode = $treeBuilder->root('gregwar_captcha', 'array');
+        
+        $rootNode
+            ->children()
+                ->arrayNode('image')
+                    ->addDefaultsIfNotSet()
+                    ->children()
+                        ->scalarNode('width')->defaultValue(120)->end()
+                        ->scalarNode('height')->defaultValue(40)->end()
+                    ->end()
+                ->end()
+            ->end()
+        ;
+        return $treeBuilder;
+    }
+}
+
diff --git a/DependencyInjection/GregwarCaptchaExtension.php b/DependencyInjection/GregwarCaptchaExtension.php
index 5292533..d1769c4 100755
--- a/DependencyInjection/GregwarCaptchaExtension.php
+++ b/DependencyInjection/GregwarCaptchaExtension.php
@@ -12,12 +12,19 @@ class GregwarCaptchaExtension extends Extension
 {
     public function load(array $configs, ContainerBuilder $container)
     {
+
         $loader = new YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('services.yml');
 
+        $configuration = new Configuration();
+        $config = $this->processConfiguration($configuration, $configs);
+
+        $container->setParameter('gregwar_captcha.image.height', $config['image']['height']);
+        $container->setParameter('gregwar_captcha.image.width', $config['image']['width']);
         $resources = $container->getParameter('twig.form.resources');
-        $resources[] = 'GregwarCaptchaBundle::captcha.html.twig';
-        $container->setParameter('twig.form.resources', $resources);
+        $container->setParameter('twig.form.resources',array_merge(array('GregwarCaptchaBundle::captcha.html.twig'), $resources));
+        
     }
+    
 }
 
diff --git a/Generator/CaptchaGenerator.php b/Generator/CaptchaGenerator.php
index c923497..2981c45 100644
--- a/Generator/CaptchaGenerator.php
+++ b/Generator/CaptchaGenerator.php
@@ -14,14 +14,17 @@ class CaptchaGenerator {
         $this->value = $value;
     }
 
-    public function getCode()
+    public function getCode($width = 120, $height = 40)
     {
-        return 'data:image/jpeg;base64,'.base64_encode($this->generate());
+        return 'data:image/jpeg;base64,'.base64_encode($this->generate($width, $height));
     }
-
-    public function generate()
+    
+    /**
+     * Generate the image
+     */
+    public function generate($width, $height)
     {
-        $i = imagecreatetruecolor(120,40);
+        $i = imagecreatetruecolor($width,$height);
 
         $col = imagecolorallocate($i, mt_rand(0,110), mt_rand(0,110), mt_rand(0,110));
 
@@ -30,10 +33,10 @@ class CaptchaGenerator {
         // Draw random lines
         for ($t=0; $t<10; $t++) {
             $tcol = imagecolorallocate($i, 100+mt_rand(0,150), 100+mt_rand(0,150), 100+mt_rand(0,150));
-            $Xa = mt_rand(0, 120);
-            $Ya = mt_rand(0, 40);
-            $Xb = mt_rand(0, 120);
-            $Yb = mt_rand(0, 40);
+            $Xa = mt_rand(0, $width);
+            $Ya = mt_rand(0, $height);
+            $Xb = mt_rand(0, $width);
+            $Yb = mt_rand(0, $height);
             imageline($i, $Xa, $Ya, $Xb, $Yb, $tcol);
         }
 
@@ -41,15 +44,15 @@ class CaptchaGenerator {
         imagettftext($i, 28, 0, 5, 32, $col, dirname(__FILE__).'/Font/captcha.ttf', $this->value);
 
         // Distort the image
-        $X = mt_rand(0, 120);
-        $Y = mt_rand(0, 40);
+        $X = mt_rand(0, $width);
+        $Y = mt_rand(0, $height);
         $Phase=mt_rand(0,10);
         $Scale = 1.3 + mt_rand(0,10000)/30000;
         $Amp=1+mt_rand(0,1000)/1000;
-        $out = imagecreatetruecolor(120,40);
+        $out = imagecreatetruecolor($width, $height);
 
-        for ($x=0; $x<120; $x++)
-            for ($y=0; $y<40; $y++) {
+        for ($x=0; $x<$width; $x++)
+            for ($y=0; $y<$height; $y++) {
                 $Vx=$x-$X;
                 $Vy=$y-$Y;
                 $Vn=sqrt($Vx*$Vx+$Vy*$Vy);
@@ -83,7 +86,7 @@ class CaptchaGenerator {
         return ob_get_clean();
     }
 
-    function getCol($image, $x, $y)
+    protected function getCol($image, $x, $y)
     {
         $L = imagesx($image);
         $H = imagesy($image);
@@ -92,7 +95,7 @@ class CaptchaGenerator {
         else return imagecolorat($image, $x, $y);
     }
 
-    function getRGB($col) {
+    protected function getRGB($col) {
         return array(
             (int)($col >> 16) & 0xff,
             (int)($col >> 8) & 0xff,
diff --git a/README.md b/README.md
index 67b0534..2741e3e 100644
--- a/README.md
+++ b/README.md
@@ -1,43 +1,79 @@
 Gregwar's CaptchaBundle
 =====================
 
-`GregwarCaptchaBundle` provides the form type "captcha"
+The `GregwarCaptchaBundle` adds support for a "captcha" form type for the
+Symfony2 form component.
 
 Installation
 ============
 
-To install `GregwarCaptchaBundle`, first adds it to your `deps`:
+### Step 1: Download the GregwarCaptchaBundle
 
+Ultimately, the GregwarCaptchaBundle files should be downloaded to the
+'vendor/bundles/Gregwar/CaptchaBundle' directory.
+
+You can accomplish this several ways, depending on your personal preference.
+The first method is the standard Symfony2 method.
+
+***Using the vendors script***
+
+Add the following lines to your `deps` file:
+
+```
     [GregwarCaptchaBundle]
         git=git://github.com/Gregwar/CaptchaBundle.git
         target=/bundles/Gregwar/CaptchaBundle
-
-And run `php bin/vendors install`. Then add the namespace to your `app/autoload.php` 
-file:
-
-```php
-<?php
-...
-'Gregwar' => __DIR__.'/../vendor/bundles',
-...
 ```
 
-And registers the bundle in your `app/AppKernel.php`:
+Now, run the vendors script to download the bundle:
+
+``` bash
+$ php bin/vendors install
+```
+
+***Using submodules***
+
+If you prefer instead to use git submodules, then run the following:
+
+``` bash
+$ git submodule add git://github.com/Gregwar/CaptchaBundle.git vendor/bundles/Gregwar/CaptchaBundle
+$ git submodule update --init
+```
+
+### Step 2: Configure the Autoloader
+
+Now you will need to add the `Gregwar` namespace to your autoloader:
+
+``` php
+<?php
+// app/autoload.php
+
+$loader->registerNamspaces(array(
+    // ...
+    'Gregwar' => __DIR__.'/../vendor/bundles',
+));
+```
+### Step 3: Enable the bundle
+
+Finally, enable the bundle in the kernel:
 
 ```php
 <?php
-//...
+// app/appKernel.php
+
 public function registerBundles()
 {
     $bundles = array(
-        ...
+        // ...
         new Gregwar\CaptchaBundle\GregwarCaptchaBundle(),
-        ...
     );
-...
+}
 ```
 
-Adds the following configuration to your `app/config/config.yml`:
+Configuration
+=============
+
+Add the following configuration to your `app/config/config.yml`:
 
     gregwar_captcha: ~
 
@@ -59,17 +95,21 @@ with route and subrequests.
 Form theming
 ============
 
-If you want to put the image in an other way, you can form theme `captcha_bundle` (this
-is the default behavior) :
+The widget support the standard symfony theming, see the [documentation](http://symfony.com/doc/current/book/forms.html#form-theming) for details on how to accomplish this.
+
+The default rendering is:
 
 ```html
 {% block captcha_widget %}
-    <img src="{{ captcha_code }}" title="captcha" width="120" height="40" />
+{% spaceless %}
+    <img src="{{ captcha_code }}" title="captcha" width="{{ captcha_width }}" height="{{ captcha_height }}" />
     {{ form_widget(form) }}
+{% spaceless %}
 {% endblock %}
 ```
 
 License
 =======
+This bundle is under the MIT license. See the complete license in the bundle:
+    LICENSE
 
-This bundle is under MIT license
diff --git a/Resources/config/services.yml b/Resources/config/services.yml
index b3d8334..a423810 100755
--- a/Resources/config/services.yml
+++ b/Resources/config/services.yml
@@ -3,6 +3,6 @@ services:
     # captcha type
     captcha.type:
         class: Gregwar\CaptchaBundle\Type\CaptchaType
-        arguments: [@session]
+        arguments: [@session, @service_container]
         tags:
             - { name: form.type, alias: captcha }
diff --git a/Resources/views/captcha.html.twig b/Resources/views/captcha.html.twig
index 7a44969..a3df35c 100644
--- a/Resources/views/captcha.html.twig
+++ b/Resources/views/captcha.html.twig
@@ -1,4 +1,7 @@
 {% block captcha_widget %}
-    <img src="{{ captcha_code }}" title="captcha" width="120" height="40" />
+{% spaceless %}
+    <img src="{{ captcha_code }}" title="captcha" width="{{ captcha_width }}" height="{{ captcha_height }}" />
     {{ form_widget(form) }}
+{% endspaceless %}
 {% endblock %}
+
diff --git a/Type/CaptchaType.php b/Type/CaptchaType.php
index 94ff7cd..48a4d79 100755
--- a/Type/CaptchaType.php
+++ b/Type/CaptchaType.php
@@ -2,13 +2,14 @@
 
 namespace Gregwar\CaptchaBundle\Type;
 
+use Symfony\Component\HttpFoundation\Session;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
 use Symfony\Component\Form\FormView;
 use Symfony\Component\Form\FormInterface;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\FormBuilder;
-use Symfony\Bridge\Doctrine\RegistryInterface;
 use Symfony\Component\Form\Exception\FormException;
-use Symfony\Component\HttpFoundation\Session;
 
 use Gregwar\CaptchaBundle\Validator\CaptchaValidator;
 use Gregwar\CaptchaBundle\Generator\CaptchaGenerator;
@@ -20,13 +21,33 @@ use Gregwar\CaptchaBundle\Generator\CaptchaGenerator;
  */
 class CaptchaType extends AbstractType
 {
+    /**
+     * The image height
+     * @var integer
+     */
+    protected $height;
+    
+    /**
+     * The image width
+     * @var integer
+     */
+    protected $width;
+
+    /** 
+     * The session
+     * @var Symfony\Component\HttpFoundation\Session
+     */
+    protected $session;
+    
     private $key = 'captcha';
 
-    protected $session;
 
-    public function __construct(Session $session)
+    public function __construct(Session $session, ContainerInterface $container)
     {
         $this->session = $session;
+        $this->height = $container->getParameter('gregwar_captcha.image.height');
+        $this->width  = $container->getParameter('gregwar_captcha.image.width');
+        
     }
 
     public function buildForm(FormBuilder $builder, array $options)
@@ -40,7 +61,9 @@ class CaptchaType extends AbstractType
     {
         $generator = new CaptchaGenerator($this->generateCaptchaValue());
 
-        $view->set('captcha_code', $generator->getCode());
+        $view->set('captcha_code', $generator->getCode($this->width, $this->height));
+        $view->set('captcha_width', $this->width);
+        $view->set('captcha_height', $this->height);
     }    
 
     public function getParent(array $options)