diff --git a/framework/yii/helpers/HtmlPurifier.php b/framework/yii/helpers/HtmlPurifier.php
index 1173091..efba874 100644
--- a/framework/yii/helpers/HtmlPurifier.php
+++ b/framework/yii/helpers/HtmlPurifier.php
@@ -26,6 +26,9 @@ namespace yii\helpers;
  *
  * For more details please refer to HTMLPurifier documentation](http://htmlpurifier.org/).
  *
+ * Note that you should add `ezyang/htmlpurifier` to your composer.json `require` section and run `composer install`
+ * before using it.
+ *
  * @author Alexander Makarov <sam@rmcreative.ru>
  * @since 2.0
  */
diff --git a/framework/yii/helpers/base/HtmlPurifier.php b/framework/yii/helpers/base/HtmlPurifier.php
index 799dabf..9c4835f 100644
--- a/framework/yii/helpers/base/HtmlPurifier.php
+++ b/framework/yii/helpers/base/HtmlPurifier.php
@@ -25,7 +25,9 @@ class HtmlPurifier
 	 */
 	public static function process($content, $config = null)
 	{
-		$purifier=\HTMLPurifier::instance($config);
+		$configInstance = \HTMLPurifier_Config::create($config);
+		$configInstance->autoFinalize = false;
+		$purifier=\HTMLPurifier::instance($configInstance);
 		$purifier->config->set('Cache.SerializerPath', \Yii::$app->getRuntimePath());
 		return $purifier->purify($content);
 	}