Update README.md

dolymood · web-flow · commit e2a4f2efdb65 · 2019-11-01T16:05:46.000+08:00
diff --git a/README.md b/README.md
@@ -4,7 +4,7 @@
 
 ![example](https://github.com/simple-uploader/vue-uploader/blob/master/example/simple-uploader.gif)
 
-![QQ](https://github.com/simple-uploader/Uploader/blob/develop/assets/simple-uploader-QQ.jpg?raw=true)
+![QQ](https://github.com/simple-uploader/Uploader/blob/develop/assets/simple-uploader-QQ-2.png?raw=true)
 
 [中文](./README_zh-CN.md)
 
