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 5c635d39..5dc18478 100644
--- a/problems/0349.两个数组的交集.md
+++ b/problems/0349.两个数组的交集.md
@@ -127,7 +127,7 @@ class Solution:
         for num in nums2:
             if num in set1:
                 result_set.add(num) # set1里出现的nums2元素 存放到结果
-        return result_set
+        return list(result_set)
 ```