diff --git a/MACA.md b/MACA.md
index e5d6163..af04119 100644
--- a/MACA.md
+++ b/MACA.md
@@ -17,9 +17,9 @@
 #### YUM安装MACA SDK
 
    ##### 1.安装maca_sdk最新版本
-      ```bash
-      yum install maca_sdk
-      ```
+             ```bash
+             yum install maca_sdk
+             ```
 
    - **2.安装maca_sdk指定版本**
       ```bash