diff --git a/three.js/examples/multi-markers/examples/player.html b/three.js/examples/multi-markers/examples/player.html
index 410f5e46e3718b6db0edb74275ec0f00c43b59cf..4928da86efa1f7c943767552a06529d92c81bb36 100644
--- a/three.js/examples/multi-markers/examples/player.html
+++ b/three.js/examples/multi-markers/examples/player.html
@@ -107,7 +107,8 @@
 		cameraParametersUrl: THREEx.ArToolkitContext.baseURL + '../data/data/camera_para.dat',
 		detectionMode: 'mono',
 		maxDetectionRate: 30,
-		// debug: true,
+		canvasWidth: 80*4,
+		canvasHeight: 60*4,
 	})
 	// initialize it
 	arToolkitContext.init(function onCompleted(){