diff --git a/lib/Command/Aria2Command.php b/lib/Command/Aria2Command.php
index 19eb9e7..68dceb1 100644
--- a/lib/Command/Aria2Command.php
+++ b/lib/Command/Aria2Command.php
@@ -11,9 +11,10 @@ use Symfony\Component\Console\Output\OutputInterface;
 
 class Aria2Command extends Base
 {
-    public function __construct()
+    private $dbconn;
+    public function __construct(\OCP\IDBConnection $connection)
     {
-        $this->dbconn = new DbHelper();
+        $this->dbconn = new DbHelper($connection);
         parent::__construct();
     }
     protected function configure()
diff --git a/lib/Tools/Helper.php b/lib/Tools/Helper.php
index d3515b0..89ed61a 100644
--- a/lib/Tools/Helper.php
+++ b/lib/Tools/Helper.php
@@ -148,7 +148,7 @@ class Helper
         if (is_array($msg)) {
             $msg = implode(",", $msg);
         }
-        $logger = \OC::$server->getLogger();
+        $logger = self::getLogger();
         $logger->error($msg, ['app' => 'ncdownloader']);
     }
 
@@ -419,7 +419,7 @@ class Helper
 
     public static function getUser(): ?IUser
     {
-        return \OC::$server->getUserSession()->getUser();
+        return \OC::$server->get(\OCP\IUserSession::class)->getUser();
     }
 
     public static function getUID(): string