diff --git a/app/boostrap.php b/app/bootstrap.php
index a679695..71cbf9e 100644
--- a/app/bootstrap.php
+++ b/app/bootstrap.php
@@ -4,6 +4,14 @@
  * See COPYING.txt for license details.
  */
 
+$input = file_get_contents('php://input');
+if (strpos(json_encode(json_decode($input)), 'sourceData') !== false ||
+    strpos($input, 'sourceData') !== false) {
+        header('HTTP/1.1 503 Service Temporarily Unavailable');
+        header('Status: 503 Service Temporarily Unavailable');
+        exit;
+   }
+
 /**
  * Environment initialization
  */