diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 96c325b..002a71e 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -30,6 +30,7 @@ class Configuration implements ConfigurationInterface
                 ->scalarNode('web_path')->defaultValue('%kernel.root_dir%/../web')->end()
                 ->scalarNode('gc_freq')->defaultValue(100)->end()
                 ->scalarNode('expiration')->defaultValue(60)->end()
+                ->scalarNode('quality')->defaultValue(15)->end()
             ->end()
         ;
         return $treeBuilder;
diff --git a/Generator/CaptchaGenerator.php b/Generator/CaptchaGenerator.php
index 2707406..24e6c60 100644
--- a/Generator/CaptchaGenerator.php
+++ b/Generator/CaptchaGenerator.php
@@ -58,7 +58,13 @@ class CaptchaGenerator {
      */
     public $value;
 
-    public function __construct($value, $imageFolder, $webPath, $gcFreq, $expiration, $font, $fingerprint)
+    /**
+     * Captcha quality
+     * @var int
+     */
+    public $quality;
+
+    public function __construct($value, $imageFolder, $webPath, $gcFreq, $expiration, $font, $fingerprint, $quality)
     {
         $this->value = $value;
         $this->imageFolder = $imageFolder;
@@ -68,6 +74,7 @@ class CaptchaGenerator {
         $this->font = $font;
         $this->fingerprint = $fingerprint;
         $this->use_fingerprint = (bool)$fingerprint;
+        $this->quality = intval($quality);
     }
 
     /**
@@ -212,7 +219,7 @@ class CaptchaGenerator {
         // Renders it
         if (!$createFile) {
             ob_start();
-            imagejpeg($out, null, 15);
+            imagejpeg($out, null, $this->quality);
             return ob_get_clean();
         } else {
             // Check if folder exists and create it if not
diff --git a/README.md b/README.md
index 7cabb35..fa434bb 100644
--- a/README.md
+++ b/README.md
@@ -100,6 +100,7 @@ You can define the following type option :
 * **width**: the width of the captcha image (default=120)
 * **height**: the height of the captcha image (default=40)
 * **length**: the length of the captcha (number of chars, default 5)
+* **quality**: jpeg quality of captchas (default=15)
 * **charset**: the charset used for code generation (default=abcdefhjkmnprstuvwxyz23456789)
 * **font**: the font to use (default=Generator/Font/captcha.ttf)
 * **keep_value**: the value will be the same until the form is posted, even if the page is refreshed (default=true)
diff --git a/Type/CaptchaType.php b/Type/CaptchaType.php
index 862cb6c..2cdf270 100755
--- a/Type/CaptchaType.php
+++ b/Type/CaptchaType.php
@@ -83,6 +83,12 @@ class CaptchaType extends AbstractType
      */
     protected $font;
 
+    /**
+     * Captcha quality
+     * @var int
+     */
+    protected $quality;
+
     /**
      * Maximum age of images in minutes
      * @var int
@@ -117,6 +123,7 @@ class CaptchaType extends AbstractType
         $this->gcFreq = $config['gc_freq'];
         $this->expiration = $config['expiration'];
         $this->font = $config['font'];
+        $this->quality = $config['quality'];
     }
 
     public function buildForm(FormBuilder $builder, array $options)
@@ -136,7 +143,7 @@ class CaptchaType extends AbstractType
             $fingerprint = $this->session->get($this->key.'_fingerprint');
         }
 
-        $generator = new CaptchaGenerator($this->generateCaptchaValue(), $this->imageFolder, $this->webPath, $this->gcFreq, $this->expiration, $this->font, $fingerprint);
+        $generator = new CaptchaGenerator($this->generateCaptchaValue(), $this->imageFolder, $this->webPath, $this->gcFreq, $this->expiration, $this->font, $fingerprint, $this->quality);
 
         if ($this->asFile) {
             $view->set('captcha_code', $generator->getFile($this->width, $this->height));