diff --git a/problems/0046.全排列.md b/problems/0046.全排列.md
index ce07395a..5a4ff154 100644
--- a/problems/0046.全排列.md
+++ b/problems/0046.全排列.md
@@ -331,7 +331,7 @@ var permute = function(nums) {
 
 ```
 
-## TypeScript
+### TypeScript
 
 ```typescript
 function permute(nums: number[]): number[][] {