diff --git a/README.md b/README.md
index 1ee3fe4..aa10f50 100755
--- a/README.md
+++ b/README.md
@@ -104,7 +104,7 @@ proton.addRenderer(renderer);
 
 * Use `Proton.Body` and `Proton.Color` at the same time. I suggest you'd better use the `WebGLRenderer` not `CanvasRenderer`.
 
-* Added `Proton.Cyclone` behavior, you can make vortex effects with Cyclone. Demo please check [here](https://codesandbox.io/s/proton-cyclone-yvibu).
+* Added `Proton.Cyclone` behavior, you can make vortex effects with Cyclone. Demo please check [here](https://codesandbox.io/s/proton-cyclone-rzweu).
 
 * Use Euler integration calculation is more accurate (default false) `Proton.USE_CLOCK = false or true;`.