diff --git a/MACA.md b/MACA.md
index 2128cac..8fa888a 100644
--- a/MACA.md
+++ b/MACA.md
@@ -13,10 +13,10 @@
 
    yum makecache
 
-```
+   ```
    示例
   yum install commonlib
-```
+   ```
 - **适配所有 Ubuntu 系统**
 
    ```bash