diff --git a/appinfo/application.php b/appinfo/application.php
index efd0ea6..1541c44 100644
--- a/appinfo/application.php
+++ b/appinfo/application.php
@@ -50,7 +50,6 @@ class Application extends App
                 $container->query('UserId'),
                 \OC::$server->getL10N('ncdownloader'),
                 //\OC::$server->getRootFolder(),
-                $container->query("Youtube"),
                 $container->query('Aria2')
             );
         });
diff --git a/appinfo/info.xml b/appinfo/info.xml
index 2df1345..a9c3d73 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -5,7 +5,7 @@
     <summary>Aria2 and youtube-dl web gui for nextcloud</summary>
     <description>built-in torrent search;Start and stop Aria2 process, manage Aria2 from the web;
 Download videos from youtube, twitter and other sites;</description>
-    <version>0.1.0</version>
+    <version>0.1.1</version>
     <licence>agpl</licence>
     <author mail="freefallbenson@gmail.com" homepage="https://github.com/shiningw">jiaxinhuang</author>
     <namespace>NCDownloader</namespace>
diff --git a/lib/Controller/MainController.php b/lib/Controller/MainController.php
index a5b6318..0c8bb5a 100644
--- a/lib/Controller/MainController.php
+++ b/lib/Controller/MainController.php
@@ -5,7 +5,6 @@ namespace OCA\NCDownloader\Controller;
 use OCA\NCDownloader\Tools\Aria2;
 use OCA\NCDownloader\Tools\DBConn;
 use OCA\NCDownloader\Tools\Helper;
-use OCA\NCDownloader\Tools\Youtube;
 use OCP\AppFramework\Controller;
 use OCP\AppFramework\Http\JSONResponse;
 use OCP\AppFramework\Http\TemplateResponse;
@@ -23,21 +22,17 @@ class MainController extends Controller
     private $aria2Opts;
     private $l10n;
 
-    public function __construct($appName, IRequest $request, $UserId, IL10N $IL10N, Youtube $youtube, Aria2 $aria2)
+    public function __construct($appName, IRequest $request, $UserId, IL10N $IL10N, Aria2 $aria2)
     {
         parent::__construct($appName, $request);
         $this->appName = $appName;
         $this->uid = $UserId;
         $this->l10n = $IL10N;
-        $this->dataDir = \OC::$server->getSystemConfig()->getValue('datadirectory');
         //$this->rootFolder = $rootFolder;
         OC_Util::setupFS();
-        $this->urlGenerator = \OC::$server->getURLGenerator();
         $this->aria2 = $aria2;
         $this->aria2->init();
-        $this->youtube = $youtube;
         $this->dbconn = new DBConn();
-        $this->tablename = $this->dbconn->queryBuilder->getTableName("ncdownloader_info");
     }
     /**
      * @NoAdminRequired
@@ -53,7 +48,7 @@ class MainController extends Controller
         $params = array();
         $params['aria2_running'] = $this->aria2->isRunning();
         $params['aria2_installed'] = $this->aria2->isInstalled();
-        $params['youtube_installed'] = $this->youtube->isInstalled();
+        $params['youtube_installed'] = (bool) Helper::findBinaryPath('youtube-dl');
 
         $response = new TemplateResponse($this->appName, 'Index', $params);