diff --git a/README.md b/README.md
index 2820e0d7..fbfce442 100755
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Canyon is a JavaScript code coverage collection platform. We address the difficu
 
 ## WeChat Group
 
-<img src="./screenshots/wechat7.jpg" style="width: 200px"/>
+<img src="./screenshots/wechat7.png" style="width: 200px"/>
 
 
 ## Contribution
diff --git a/screenshots/wechat7.png b/screenshots/wechat7.png
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Binary files a/screenshots/wechat7.png and b/screenshots/wechat7.png differ