diff --git a/MACA.md b/MACA.md
index 8fa888a..21885fd 100644
--- a/MACA.md
+++ b/MACA.md
@@ -14,8 +14,8 @@
    yum makecache
 
    ```
-   示例
-  yum install commonlib
+示例
+yum install commonlib
    ```
 - **适配所有 Ubuntu 系统**