diff --git a/index.html b/index.html
index 045c07d..e3c0c3f 100644
--- a/index.html
+++ b/index.html
@@ -88,7 +88,7 @@
 	        	setTimeout(function(){
 	        		if(isWaiting && options.video.quality.length > 1){
 	        			dp.notice("监测到卡顿，切换片源");
-	        			options.video.defaultQuality = (options.video.defaultQuality >= options.video.quality.length - 1) ? 0 : options.video.defaultQuality++;
+	        			options.video.defaultQuality = (options.video.defaultQuality >= options.video.quality.length - 1) ? 0 : options.video.defaultQuality+1;
 	        			dp.switchQuality(options.video.defaultQuality);
 	        		}
 	        	}, 8000);