diff --git a/src/stores/login.js b/src/stores/login.js
index 84225d0..9e20f99 100644
--- a/src/stores/login.js
+++ b/src/stores/login.js
@@ -7,10 +7,12 @@ export default defineStore('loginStore', {
   // state, actions, getters
   state: () => ({
     auth: {
-      grant_type: 'password',
+      grant_type: 'password', // password | refresh_token
       username: '',
       password: '',
+      refresh_token: ''
     },
+    refreshToken: '',
     isInvalid: false,
     userData: {},
   }),
@@ -29,9 +31,11 @@ export default defineStore('loginStore', {
 
       try {
         const response = await axios.post(api, this.auth, config);
-        const token = response.data.access_token;
+        const accessToken = response.data.access_token;
+
+        this.refreshToken = response.data.refresh_token;
         // 將 token 儲存在 cookie
-        document.cookie = `luciaToken=${token};`;
+        document.cookie = `luciaToken=${accessToken};`;
         // // 取得當前日期
         // const currentDate = new Date();
         // // 設定 cookie 的過期日期為一天後
@@ -44,6 +48,22 @@ export default defineStore('loginStore', {
         this.isInvalid = true;
       };
     },
+    /**
+     * Refresh Token
+     */
+    async refreshTokenLogin() {
+      const api = '/api/oauth/token';
+      this.auth.grant_type = 'refresh_token';
+      this.auth.refresh_token = this.refreshToken;
+
+      try {
+        const response = await axios.post(api, this.auth, config);
+        const newAccessToken = response.data.access_token;
+        document.cookie = `luciaToken=${newAccessToken};`;
+      } catch(error) {
+        this.$router.push('/login');
+      }
+    },
     /**
      * Logout, tooken expired
      */