diff --git a/Plugin/DotpayDirectPlugin.php b/Plugin/DotpayDirectPlugin.php
index b88f33c..c8ce9d2 100644
--- a/Plugin/DotpayDirectPlugin.php
+++ b/Plugin/DotpayDirectPlugin.php
@@ -19,7 +19,7 @@
 use JMS\Payment\CoreBundle\Plugin\Exception\FunctionNotSupportedException;
 
 use ETS\Payment\DotpayBundle\Client\Token;
-use ETS\Payment\DotpayBundle\Tools\String;
+use ETS\Payment\DotpayBundle\Tools\StringNormalizer;
 
 /*
  * Copyright 2012 ETSGlobal <ecs@etsglobal.org>
@@ -71,7 +71,7 @@ class DotpayDirectPlugin extends AbstractPlugin
     protected $token;
 
     /**
-     * @var \ETS\Payment\DotpayBundle\Tools\String
+     * @var \ETS\Payment\DotpayBundle\Tools\StringNormalizer
      */
     protected $stringTools;
 
@@ -91,14 +91,14 @@ class DotpayDirectPlugin extends AbstractPlugin
     protected $type;
 
     /**
-     * @param Router  $router      The router
-     * @param Token   $token       The client token
-     * @param String  $stringTools The String tool package
-     * @param string  $url         The urlc
-     * @param integer $type        The type
-     * @param string  $returnUrl   The return url
+     * @param Router            $router      The router
+     * @param Token             $token       The client token
+     * @param StringNormalizer  $stringTools The StringNormalizer tool package
+     * @param string            $url         The urlc
+     * @param int               $type        The type
+     * @param string            $returnUrl   The return url
      */
-    public function __construct(Router $router, Token $token, String $stringTools, $url, $type, $returnUrl)
+    public function __construct(Router $router, Token $token, StringNormalizer $stringTools, $url, $type, $returnUrl)
     {
         $this->router = $router;
         $this->token = $token;
diff --git a/Resources/config/services.xml b/Resources/config/services.xml
index 1ad18c9..7f2b282 100644
--- a/Resources/config/services.xml
+++ b/Resources/config/services.xml
@@ -8,7 +8,7 @@
         <parameter key="payment.plugin.dotpay_direct.class">ETS\Payment\DotpayBundle\Plugin\DotpayDirectPlugin</parameter>
         <parameter key="payment.form.dotpay_direct_type.class">ETS\Payment\DotpayBundle\Form\DirectType</parameter>
         <parameter key="payment.dotpay.client.token.class">ETS\Payment\DotpayBundle\Client\Token</parameter>
-        <parameter key="payment.dotpay.tools.string.class">ETS\Payment\DotpayBundle\Tools\String</parameter>
+        <parameter key="payment.dotpay.tools.string.class">ETS\Payment\DotpayBundle\Tools\StringNormalizer</parameter>
     </parameters>
 
     <services>
diff --git a/Tests/Tools/StringTest.php b/Tests/Tools/StringNormalizerTest.php
similarity index 89%
rename from Tests/Tools/StringTest.php
rename to Tests/Tools/StringNormalizerTest.php
index c6151cc..613a8c2 100644
--- a/Tests/Tools/StringTest.php
+++ b/Tests/Tools/StringNormalizerTest.php
@@ -2,7 +2,7 @@
 
 namespace ETS\PurchaseBundle\Tests\Tools;
 
-use ETS\Payment\DotpayBundle\Tools\String;
+use ETS\Payment\DotpayBundle\Tools\StringNormalizer;
 
 /*
  * Copyright 2012 ETSGlobal <ecs@etsglobal.org>
@@ -25,7 +25,7 @@
  *
  * @author ETSGlobal <ecs@etsglobal.org>
  */
-class StringTest extends \PHPUnit_Framework_TestCase
+class StringNormalizerTest extends \PHPUnit_Framework_TestCase
 {
     /**
      * @return array
@@ -47,7 +47,7 @@ public function normalizeProvider()
      */
     public function testNormaize($input, $expected)
     {
-        $tool = new String();
+        $tool = new StringNormalizer();
 
         $this->assertEquals($expected, $tool->normalize($input));
     }
diff --git a/Tools/String.php b/Tools/StringNormalizer.php
similarity index 61%
rename from Tools/String.php
rename to Tools/StringNormalizer.php
index b08043a..0600e15 100644
--- a/Tools/String.php
+++ b/Tools/StringNormalizer.php
@@ -3,9 +3,9 @@
 namespace ETS\Payment\DotpayBundle\Tools;
 
 /**
- * String tools
+ * StringNormalizer tools
  */
-class String
+class StringNormalizer
 {
     /**
      * Remove all unwanted caracters
@@ -16,6 +16,6 @@ class String
      */
     public function normalize($text)
     {
-        return preg_replace('/\pM*/u', '', normalizer_normalize($text, \Normalizer::FORM_D));
+        return preg_replace('/\pM*/u', '', \Normalizer::normalize($text, \Normalizer::FORM_D));
     }
 }