diff --git a/Gateways/Impl/FileGatewayImpl.php b/Gateways/Impl/FileGatewayImpl.php
index 5891323..ffd15b3 100644
--- a/Gateways/Impl/FileGatewayImpl.php
+++ b/Gateways/Impl/FileGatewayImpl.php
@@ -12,6 +12,8 @@
 use OpenClassrooms\Bundle\OneSkyBundle\Model\ExportFile;
 use OpenClassrooms\Bundle\OneSkyBundle\Model\UploadFile;
 use Symfony\Component\EventDispatcher\EventDispatcher;
+use Symfony\Component\Yaml\Yaml as SFYaml;
+use Symfony\Component\HttpKernel\Exception\HttpException;
 
 /**
  * @author Romain Kuzniak <romain.kuzniak@openclassrooms.com>
@@ -58,7 +60,14 @@ private function downloadTranslation(ExportFile $file)
         );
         $downloadedContent = $this->client->translations(self::DOWNLOAD_METHOD, $file->format());
         $this->checkTranslation($downloadedContent, $file);
-        file_put_contents($file->getTargetFilePath(), $downloadedContent);
+        if(!empty($downloadedContent)) {
+            if (is_callable("yaml_parse"))
+                file_put_contents($file->getTargetFilePath(), SFYaml::dump(yaml_parse($downloadedContent)));
+            else
+                throw new HttpException(500, "PHP YAML extension is missing ( https://pecl.php.net/package/yaml )");
+        }
+        else
+            file_put_contents($file->getTargetFilePath(), $downloadedContent);
 
         return $file;
     }
diff --git a/README.md b/README.md
index 0d196d4..8b74a6d 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,24 @@ or by adding the package to the composer.json file directly:
 }
 ```
 
+This bundle need the YAML extension : https://pecl.php.net/package/yaml
+
+#### PHP 7
+```
+apt-get install php-pear libyaml-dev
+pecl install yaml-2.0.0
+```
+Add "extension=yaml.so" to php.ini for CLI
+
+#### PHP 5
+```
+apt-get install php-pear libyaml-dev
+pecl install yaml
+```
+Add "extension=yaml.so" to php.ini for CLI
+
+
+
 After the package has been installed, add the bundle to the AppKernel.php file:
 ```php
 // in AppKernel::registerBundles()