diff --git a/problems/0349.两个数组的交集.md b/problems/0349.两个数组的交集.md
index a6e07424..bd83fae9 100644
--- a/problems/0349.两个数组的交集.md
+++ b/problems/0349.两个数组的交集.md
@@ -91,7 +91,7 @@ public:
 
 对应C++代码如下：
 
-```c++
+```CPP
 class Solution {
 public:
     vector<int> intersection(vector<int>& nums1, vector<int>& nums2) {