diff --git a/plugins/Dashboard/Controller.php b/plugins/Dashboard/Controller.php
index 4c7d0c53f4fd33d24c56d164f58a1bc042288bb6..afd5e4236e4fe149f9c73f7c25157a6a4c68a71f 100644
--- a/plugins/Dashboard/Controller.php
+++ b/plugins/Dashboard/Controller.php
@@ -88,6 +88,7 @@ class Controller extends \Piwik\Plugin\Controller
 
         $layout = $this->getLayout($idDashboard);
 
+        Json::sendHeaderJSON();
         return $layout;
     }