diff --git a/MangaRipper.Core/Worker.cs b/MangaRipper.Core/Worker.cs
index d2cffdc..03d3ff3 100644
--- a/MangaRipper.Core/Worker.cs
+++ b/MangaRipper.Core/Worker.cs
@@ -20,7 +20,7 @@ public Worker()
         {
             logger.Info("> Worker()");
             source = new CancellationTokenSource();
-            sema = new SemaphoreSlim(1);
+            sema = new SemaphoreSlim(2);
         }
 
         public void Cancel()