diff --git a/content/post/奇技淫巧/前端读写OSS.md b/content/post/奇技淫巧/前端读写OSS.md
index bb29515..9eed342 100644
--- a/content/post/奇技淫巧/前端读写OSS.md
+++ b/content/post/奇技淫巧/前端读写OSS.md
@@ -207,7 +207,7 @@ app.get('/get-url', async (req, res) => {
     const uploadFile = await fetch(url, {
         method: 'PUT',
         body: file
-    }); // 上传文件
+    }); // 上传文件，生成签名时要使用POST方法
 </script>
 ```