diff --git a/build/router/controller/api.php b/build/router/controller/api.php
index 6778a66..288c625 100644
--- a/build/router/controller/api.php
+++ b/build/router/controller/api.php
@@ -37,8 +37,10 @@
 			$this->response = $this->request->dispatch();
 
 			/* (2) Manages result */
-			if( $this->response instanceof Response )
+			if( $this->response instanceof Response ){
+				header('Content-Type: application/json');
 				echo $this->response->serialize();
+			}
 
 			return true;