diff --git a/app/Jobs/ProcessModPackFile.php b/app/Jobs/ProcessModPackFile.php
index 6411e94d..908a4ba9 100644
--- a/app/Jobs/ProcessModPackFile.php
+++ b/app/Jobs/ProcessModPackFile.php
@@ -9,6 +9,7 @@
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Bus\Dispatchable;
 use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\Middleware\WithoutOverlapping;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Support\Facades\Storage;
 use Illuminate\Support\Str;
@@ -36,6 +37,16 @@ public function __construct(Modpack $modpack, string $filePath)
         $this->filePath = $filePath;
     }
 
+    /**
+     * Get the middleware the job should pass through.
+     *
+     * @return array
+     */
+    public function middleware()
+    {
+        return [new WithoutOverlapping($this->modpack->id)];
+    }
+
     /**
      * Execute the job.
      *