diff --git a/index.php b/index.php
index 42d4dfc..a5d90e7 100644
--- a/index.php
+++ b/index.php
@@ -3,6 +3,7 @@ require 'vendor/autoload.php';
 require 'config.php';
 
 if($_SERVER["REQUEST_URI"] == '/metrics' || php_sapi_name() == 'cli') {
+    header('Content-Type: text/plain; version=0.0.4');
     foreach ($config as $key => &$c) {
         if(isset($c['command'])) {
             $output=null;
@@ -66,4 +67,4 @@ function getArrayValue($elem, $array) {
         $new_array = $new_array[$i];
     }
     return $new_array;
-}
\ No newline at end of file
+}