diff --git a/problems/0127.单词接龙.md b/problems/0127.单词接龙.md
index 97bc66d0..6f893310 100644
--- a/problems/0127.单词接龙.md
+++ b/problems/0127.单词接龙.md
@@ -198,7 +198,7 @@ class Solution {
 
 ### Python 
 
-```
+```python
 class Solution:
     def ladderLength(self, beginWord: str, endWord: str, wordList: List[str]) -> int:
         wordSet = set(wordList)