diff --git a/.styleci.yml b/.styleci.yml
new file mode 100644
index 0000000..247a09c
--- /dev/null
+++ b/.styleci.yml
@@ -0,0 +1 @@
+preset: psr2
diff --git a/composer.json b/composer.json
index 9f4b77f..223773f 100644
--- a/composer.json
+++ b/composer.json
@@ -16,12 +16,13 @@
     },
     "autoload": {
         "psr-4": {
-            "Jens\\ImageConverter\\": "src/"
-        }
+            "ImageConverter\\": "src/"
+        },
+        "files": ["src/helper.php"]
     },
     "autoload-dev": {
         "psr-4": {
-            "Jens\\ImageConverter\\Tests\\": "test/"
+            "ImageConverter\\Tests\\": "test/"
         }
     },
     "require-dev": {
diff --git a/src/ImageConverter.php b/src/ImageConverter.php
index 389d8c2..1b6a1c4 100644
--- a/src/ImageConverter.php
+++ b/src/ImageConverter.php
@@ -86,8 +86,8 @@ private function saveImage($to, $image, $quality)
         }
 
 
-        if(isset($quality) && !is_int($quality)) {
-          throw new \InvalidArgumentException(sprintf('The %s quality has to be an integer', $quality));
+        if (isset($quality) && !is_int($quality)) {
+            throw new \InvalidArgumentException(sprintf('The %s quality has to be an integer', $quality));
         }
 
         switch ($extension) {
@@ -100,7 +100,7 @@ private function saveImage($to, $image, $quality)
                   throw new \InvalidArgumentException(sprintf('The %s quality is out of range', $quality));
               }
               $image = imagejpeg($image, $to, $quality);
-              break;          
+              break;
           case 'png':
               if ($quality < -1 && $quality > 9) {
                   throw new \InvalidArgumentException(sprintf('The %s quality is out of range', $quality));
@@ -169,17 +169,3 @@ private function makeDirectory($to)
         return $result;
     }
 }
-
-/**
- * Helper function
- *
- * @param string $from
- * @param string $to
- *
- * @return resource
- * @throws \InvalidArgumentException
- */
-function convert($from, $to, $quality = null) {
-  $converter = new ImageConverter();
-  return $converter->convert($from, $to, $quality);
-}
\ No newline at end of file
diff --git a/src/helper.php b/src/helper.php
new file mode 100644
index 0000000..e0d08c7
--- /dev/null
+++ b/src/helper.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace ImageConverter;
+
+/**
+ * Helper function
+ *
+ * @param string $from
+ * @param string $to
+ *
+ * @return resource
+ * @throws \InvalidArgumentException
+ */
+function convert($from, $to, $quality = null)
+{
+    $converter = new ImageConverter();
+    return $converter->convert($from, $to, $quality);
+}
diff --git a/tests/ImageConverterTest.php b/tests/ImageConverterTest.php
index 5afebcd..a1634e5 100644
--- a/tests/ImageConverterTest.php
+++ b/tests/ImageConverterTest.php
@@ -1,8 +1,8 @@
 <?php
 
-namespace Jens\ImageConverter\Tests;
+namespace ImageConverter\Tests;
 
-use Jens\ImageConverter\ImageConverter;
+use ImageConverter\ImageConverter;
 use PHPUnit\Framework\TestCase;
 
 class ImageConverterTest extends TestCase