diff --git a/MACA.md b/MACA.md
index 8b82957..632b5da 100644
--- a/MACA.md
+++ b/MACA.md
@@ -13,8 +13,9 @@
 
    yum makecache
 
-   ```bash
+   ```
    yum install commonlib
+   ```
 
 - **适配所有 Ubuntu 系统**