diff --git a/core/App.php b/core/App.php
index 9d5e750..92017ef 100644
--- a/core/App.php
+++ b/core/App.php
@@ -124,23 +124,28 @@ public static function process(Request $Request, Response $Response) {
 
     switch (true) {
       case $response === 1:
+        $Response->header('Content-type', 'text/html;charset=utf-8');
         return View::create($Request->getAction())->set($vars);
         break;
 
       case $response instanceof View:
+        $Response->header('Content-type', 'text/html;charset=utf-8');
         return $response->set($vars);
         break;
 
       case is_string($response):
+        $Response->header('Content-type', 'text/plain;charset=utf-8');
         return View::fromString($response);
         break;
 
       case is_array($response):
       case is_object($response):
+        $Response->header('Content-type', 'application/json;charset=utf-8');
         return View::fromString(json_encode($response, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE));
         break;
 
       default:
+        $Response->header('Content-type', 'text/plain;charset=utf-8');
         return View::fromString((string) $response);
     }
   }
diff --git a/skel/app/main.php b/skel/app/main.php
index 93121f6..240d12e 100644
--- a/skel/app/main.php
+++ b/skel/app/main.php
@@ -1,7 +1,7 @@
 <?php
 include getenv('KISS_CORE');
 App::start();
-$Response = Response::create(200)->header('Content-type', 'text/html;charset=utf-8');
+$Response = Response::create(200);
 $View = App::process(Request::create(), $Response)
   ->prepend('_head')
   ->append('_foot')