diff --git a/MACA.md b/MACA.md
index 14ed420..1eaac9b 100644
--- a/MACA.md
+++ b/MACA.md
@@ -38,12 +38,12 @@
 
 ## 适配所有 Ubuntu 系统**
 
-   ```bash
-   curl -fsSL https://repos.metax-tech.com/public.gpg.key | apt-key add -
-   echo "deb [arch=$(dpkg --print-architecture)] https://repos.metax-tech.com/r/maca-sdk-deb/ stable main" | tee /etc/apt/sources.list.d/maca-sdk-deb.list
-   apt-get update
+      ```bash
+      curl -fsSL https://repos.metax-tech.com/public.gpg.key | apt-key add -
+      echo "deb [arch=$(dpkg --print-architecture)] https://repos.metax-tech.com/r/maca-sdk-deb/ stable main" | tee /etc/apt/sources.list.d/maca-sdk-deb.list
+      apt-get update
 
-   ```
+      ```
 
 ### APT安装MACA SDK