diff --git a/src/Plugin.php b/src/Plugin.php
index 9ddad50..29de0d8 100644
--- a/src/Plugin.php
+++ b/src/Plugin.php
@@ -130,7 +130,12 @@ public function onPostAutoloadDump(Event $event)
 
     protected function initAutoload()
     {
-        require_once dirname(dirname(dirname(__DIR__))) . '/autoload.php';
+        $dir = dirname(dirname(dirname(__DIR__)));
+        $yii = "$dir/yiisoft/yii2/Yii.php";
+        require_once "$dir/autoload.php";
+        if (file_exists($yii)) {
+            require_once $yii;
+        }
     }
 
     protected function scanPackages()