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 e17e940f..77dfc50a 100644
--- a/problems/0349.两个数组的交集.md
+++ b/problems/0349.两个数组的交集.md
@@ -511,7 +511,7 @@ object Solution {
 
 ```
 
-###Ruby
+### Ruby:
 ```ruby
 def intersection(nums1, nums2)
   hash = {}