diff --git a/db/save-token.js b/db/save-token.js
index 2a54f04..c1c35fa 100644
--- a/db/save-token.js
+++ b/db/save-token.js
@@ -1,6 +1,14 @@
 import { connection } from "./connection.js";
+import { getTokenByUserId } from "./get-token.js";
 
 export async function saveToken(userId, token) {
-    const [rows, fields] = await connection.execute('insert into tokens values(?, ?)', [userId, token]);
-    return rows;
+    const token = await getTokenByUserId(userId);
+
+    if (!token){
+      const [rows, fields] = await connection.execute('insert into tokens values(?, ?)', [userId, token]);
+      return rows;
+    } else {
+      const [rows, fields] = await connection.execute('update tokens set token = ? where userId = ?', [token, userId]);
+      return rows;
+    }
   }
\ No newline at end of file
diff --git a/noti.js b/noti.js
index cb74cbd..a95e401 100644
--- a/noti.js
+++ b/noti.js
@@ -45,6 +45,7 @@ app.post('/send-notification', async (req, res) => {
   const { userId, title = '무제', body = 'blank' } = req.body;
   
   const token = await getTokenByUserId(userId);
+  console.log(userId, title, body, token);
 
   const message = {
     notification: {
@@ -63,6 +64,9 @@ app.post('/send-notification', async (req, res) => {
       console.error('Error sending message:', error);
       res.status(500).send('Error sending notification');
     });
+
+
+    
 });
 
 app.listen(port, () => {