diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 6d72a7f..bac834d 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -41,6 +41,7 @@ class Configuration implements ConfigurationInterface
                 ->scalarNode('distortion')->defaultValue(true)->end()
                 ->scalarNode('max_front_lines')->defaultValue(null)->end()
                 ->scalarNode('max_behind_lines')->defaultValue(null)->end()
+                ->scalarNode('interpolation')->defaultValue(true)->end()
                 ->arrayNode('background_color')->prototype('scalar')->end()
             ->end()
         ;
diff --git a/Generator/CaptchaGenerator.php b/Generator/CaptchaGenerator.php
index 4da833a..e419580 100644
--- a/Generator/CaptchaGenerator.php
+++ b/Generator/CaptchaGenerator.php
@@ -107,6 +107,8 @@ class CaptchaGenerator
             $this->builder->setBackgroundColor($color[0], $color[1], $color[2]);
         }
 
+        $this->builder->setInterpolation($options['interpolation']);
+
         $fingerprint = isset($options['fingerprint']) ? $options['fingerprint'] : null;
 
         $content = $this->builder->build(
diff --git a/README.md b/README.md
index 907ecb6..33ee8fa 100644
--- a/README.md
+++ b/README.md
@@ -139,6 +139,7 @@ You can define the following configuration options globally or on the CaptchaTyp
 * **max_front_lines**, **max_behind_lines**: the maximum number of lines to draw on top/behind the image. `0` will draw no lines; `null` will use the default algorithm (the
 number of lines depends on the size of the image). (default=null)
 * **background_color**: sets the background color, if you want to force it, this should be an array of r,g &b, for instance [255, 255, 255] will force the background to be white
+* **interpolation**: enable or disable the interpolation on the captcha
 
 Example :
 
diff --git a/composer.json b/composer.json
index 9b80a7d..827a379 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
     ],
     "require": {
         "php": ">=5.3.0",
-        "gregwar/captcha": "v1.0.4"
+        "gregwar/captcha": "v1.0.5"
     },
     "autoload": {
         "psr-0": {