diff --git a/README.md b/README.md
index fa9214790..dfb4282d3 100644
--- a/README.md
+++ b/README.md
@@ -21,5 +21,5 @@ liteFlow是一个轻量，快速的组件式流程引擎框架，组件编排，
 <br>
 **微信讨论群(二维码会定期更新)**
 <br>
-![liteflow](docs/media/liteflow.jpg)
+![liteflow](docs/media/liteflow.png)
 
diff --git a/docs/guide_cn.md b/docs/guide_cn.md
index c092e3ed0..57dcebf16 100644
--- a/docs/guide_cn.md
+++ b/docs/guide_cn.md
@@ -419,4 +419,4 @@ liteFlow提供了简单的监控，目前只统计一个指标：每个组件的
 ![offIical-wx](media/offIical-wx.jpg)
 <br><br>
 加微信群参与讨论(微信群二维码会定时更新)<br>
-![liteflow](media/liteflow.jpg)
+![liteflow](media/liteflow.png)
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