diff --git a/src/refreshSubscriptionCron.js b/src/refreshSubscriptionCron.js
index b8c290a..df6d15a 100644
--- a/src/refreshSubscriptionCron.js
+++ b/src/refreshSubscriptionCron.js
@@ -4,14 +4,45 @@ const { GoogleClient } = require('./server/lib/GoogleClient');
 const { checkAndRefreshAccessToken } = require('./server/lib/oauth');
 const { Subscription } = require('./server/models/subscriptionModel');
 const { User } = require('./server/models/userModel');
+const { errorLogger } = require('./server/lib/logger');
 
 async function refreshSubscription() {
   const currentTime = new Date();
   const expiredIn3Day = new Date(currentTime);
   expiredIn3Day.setDate(currentTime.getDate() + 3);
-  const subscriptions = await Subscription.findAll(); // TODO: add lastKey
+  let lastKey = null;
+  const lastKeyRecord = await Subscription.findByPk('SYSTEM_LAST_KEY');
+  if (lastKeyRecord && lastKeyRecord.formId) {
+    lastKey = lastKeyRecord.formId;
+  }
+  const findAllQuery = {
+    limit: 100,
+  };
+  if (lastKey) {
+    findAllQuery.lastKey = {
+      id: lastKey,
+    };
+  }
+  const subscriptions = await Subscription.findAll(findAllQuery);
+  if (subscriptions.lastKey) {
+    if (!lastKeyRecord) {
+      await Subscription.create({
+        id: 'SYSTEM_LAST_KEY',
+        formId: subscriptions.lastKey.id,
+      });
+    } else {
+      lastKeyRecord.formId = subscriptions.lastKey.id;
+      await lastKeyRecord.save();
+    }
+  } else if (lastKeyRecord) {
+    lastKeyRecord.formId = '';
+    await lastKeyRecord.save();
+  }
   const users = {};
   for (const subscription of subscriptions) {
+    if (subscription.id === 'SYSTEM_LAST_KEY') {
+      continue;
+    }
     if (subscription.watchExpiredAt < currentTime) {
       continue;
     }
@@ -46,7 +77,7 @@ async function refreshSubscription() {
       }
     } catch (e) {
       console.error('refreshing error subscription: ', subscription.id);
-      console.error(e && e.message);
+      errorLogger(e);
     }
   }
 }