diff --git a/notes/面向对象思想.md b/notes/面向对象思想.md
index d5ba57d9..2da3af94 100644
--- a/notes/面向对象思想.md
+++ b/notes/面向对象思想.md
@@ -130,7 +130,7 @@ public class Music {
 }
 ```
 
-```
+```text
 Wind is playing...
 Percussion is playing...
 ```