diff --git a/docs/uts/class.md b/docs/uts/class.md
index 270954845b5f96a659b6d39077fa7108cb96658a..06ae3e840b06b91e1d649822ece068004ada529d 100644
--- a/docs/uts/class.md
+++ b/docs/uts/class.md
@@ -494,11 +494,11 @@ class Test {
 
 #### kotlin 平台匿名内部类写法
 
-```
-		const runnable = new (class implements Runnable {
-			override run() {
-				
-			}
-		})
+```ts
+const runnable = new (class implements Runnable {
+	override run() {
+		
+	}
+})
 ```