diff --git a/modules/monitoring/application/views/helpers/PluginOutput.php b/modules/monitoring/application/views/helpers/PluginOutput.php
index 3cd36c46f..575aaf073 100644
--- a/modules/monitoring/application/views/helpers/PluginOutput.php
+++ b/modules/monitoring/application/views/helpers/PluginOutput.php
@@ -72,7 +72,10 @@ class Zend_View_Helper_PluginOutput extends Zend_View_Helper_Abstract
     protected function getPurifier()
     {
         if (self::$purifier === null) {
-            require_once 'IcingaVendor/htmlpurifier-4.6.0-lite/library/HTMLPurifier.auto.php';
+            require_once 'HTMLPurifier/Bootstrap.php';
+            require_once 'HTMLPurifier/HTMLPurifier.php';
+            require_once 'HTMLPurifier/HTMLPurifier.autoload.php';
+
             $config = HTMLPurifier_Config::createDefault();
             $config->set('Core.EscapeNonASCIICharacters', true);
             $config->set('HTML.Allowed', 'p,br,b,a[href],i,table,tr,td[colspan],div[class]');