diff --git a/vmaf-gui/Form1.cs b/vmaf-gui/Form1.cs
index fdfab12..3c30fb6 100644
--- a/vmaf-gui/Form1.cs
+++ b/vmaf-gui/Form1.cs
@@ -227,7 +227,7 @@ void vmaf(string resolution, string model, bool psnr, bool ssim)
             //string args = "yuv420p "+ resolution +" ./temp/source.yuv ./temp/compressed.yuv .\\model\\"+ model +" --log log.xml";
             Array res = resolution.Split(' ');
 
-            string args = $"--threads 4 --reference ./temp/source.y4m --distorted ./temp/compressed.y4m -o log.xml ";
+            string args = $"--threads {Environment.ProcessorCount} --reference ./temp/source.y4m --distorted ./temp/compressed.y4m -o log.xml ";
 
             args += "--model path=./model/" + model;
             /*