diff --git a/README.md b/README.md
index c42bb315..382ff192 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@
 
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-<div align="center"><img width="300px" src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/other/公众号海报.png"></img></div>
+<div align="center"><img width="300px" src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/other/公众号海报.png?v=1"></img></div>
 
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