diff --git a/README.md b/README.md
index 4b67ef5..9c66839 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@
 
 ## 思维导图
 
-![](https://cdn.142vip.cn/408CSFamily/summary.png)
+![](https://cdn.142vip.cn/408CSFamily/summary.jpg)
 
 ## 目录（善用Ctrl+F）
 
diff --git a/summary.png b/summary.jpg
similarity index 100%
rename from summary.png
rename to summary.jpg