diff --git a/README.md b/README.md
index 7ea871ad..2055e3b2 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 English | [简体中文](./README_CN.md)
-<a href="https://github.com/zfoo-project/zfoo"><img src="/doc/image/logo.jpg" style="zoom:50%"></a>
+<a href="https://github.com/zfoo-project/zfoo"><img src="/doc/image/logo.jpg" width="30%"></a>
 
 -----------
 Why is zfoo protocol ?