diff --git a/classes/class.ilQuestionSetPoolPlugin.php b/classes/class.ilQuestionSetPoolPlugin.php
index 17a5876c1b4ea59cfff99cc04e78899c12a7244c..b11e49922e3e9a1d25e96932192d423e16c794e8 100644
--- a/classes/class.ilQuestionSetPoolPlugin.php
+++ b/classes/class.ilQuestionSetPoolPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+require_once __DIR__ . '/../vendor/autoload.php';
+
 /**
  * Class ilQuestionSetPoolPlugin
  *