diff --git a/src/Command/ImportHeidelbergCommand.php b/src/Command/ImportHeidelbergCommand.php
index c9a5216..9f9e320 100644
--- a/src/Command/ImportHeidelbergCommand.php
+++ b/src/Command/ImportHeidelbergCommand.php
@@ -5,9 +5,9 @@ namespace App\Command;
 use App\Entity\Reference;
 
 use Doctrine\ORM\EntityManagerInterface;
-use Pdo\Sqlite;
 use Symfony\Component\Console\Attribute\AsCommand;
 use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
@@ -80,7 +80,7 @@ class ImportHeidelbergCommand extends Command
     {
         $files = glob($this->dir . "/*.md");
 
-        if (!$this->files || count($this->files) === 0) {
+        if (!$files || count($files) === 0) {
             $this->io->warning("No files found in this directory\n{$this->dir}");
             $files = [];
         }