diff --git a/problems/0225.用队列实现栈.md b/problems/0225.用队列实现栈.md
index 41a1ede2..94c79404 100644
--- a/problems/0225.用队列实现栈.md
+++ b/problems/0225.用队列实现栈.md
@@ -367,7 +367,7 @@ class MyStack {
 
 ```
 优化，使用一个 Queue 实现，但用卡哥的逻辑实现
-```
+```Java
 class MyStack {
     Queue<Integer> queue;