diff --git a/spine-ts/webgl/demos/utils.js b/spine-ts/webgl/demos/utils.js
index f4495508d..9b1d71241 100644
--- a/spine-ts/webgl/demos/utils.js
+++ b/spine-ts/webgl/demos/utils.js
@@ -68,7 +68,7 @@ var spineDemos = {
 	}
 
 	spineDemos.init = function () {
-		createCanvases(3);
+		createCanvases(4);
 		loadSliders();
 		requestAnimationFrame(loop);
 	}