diff --git a/raytracer.py b/raytracer.py
index 25483ca..0971ff4 100644
--- a/raytracer.py
+++ b/raytracer.py
@@ -482,6 +482,7 @@ def render(scene, width=800, height=600, samples_per_pixel=50, max_depth=15,
                 completed_rows += (chunk_end - chunk_start)
 
                 progress.update(render_task, completed=completed_rows)
+                progress.refresh()
 
                 img = (np.clip(image, 0.0, 1.0) * 255).astype(np.uint8)
                 Image.fromarray(img, 'RGB').save(preview_path)