diff --git a/problems/0018.四数之和.md b/problems/0018.四数之和.md
index 5012c35e..c1f3cb7f 100644
--- a/problems/0018.四数之和.md
+++ b/problems/0018.四数之和.md
@@ -165,7 +165,7 @@ class Solution {
 ```
 
 Python：
-```python3
+```python
 
 class Solution(object):
     def fourSum(self, nums, target):