diff --git a/kcfinder/core/uploader.php b/kcfinder/core/uploader.php
index 5bc1b968c2511737004d96d3001de65e8b508b06..f3196742631cdcee5e76f709a949b8b79d3bfece 100644
--- a/kcfinder/core/uploader.php
+++ b/kcfinder/core/uploader.php
@@ -12,6 +12,7 @@
   *      @link http://kcfinder.sunhater.com
   */
 
+require_once __DIR__ . '/../../vendor/autoload.php';
 require_once __DIR__ . '/../../include/utils/VtlibUtils.php';
 require_once __DIR__ . '/../../vtlib/Vtiger/Functions.php';