diff --git a/CHANGELOG.md b/CHANGELOG.md
index a9a362dbef..cc5a6bc8a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ ChangeLog (Release Notes)
 unreleased
 ----------
 * New: 投稿のピン留め (#746)
+* New: ホームストリームにメッセージを流すことでlast_used_atを更新できるようにする (#745)
 * その他細かな修正
 
 2508 (2017/08/30)
diff --git a/src/api/stream/home.ts b/src/api/stream/home.ts
index 2ab8d3025b..d5fe01c261 100644
--- a/src/api/stream/home.ts
+++ b/src/api/stream/home.ts
@@ -2,6 +2,7 @@ import * as websocket from 'websocket';
 import * as redis from 'redis';
 import * as debug from 'debug';
 
+import User from '../models/user';
 import serializePost from '../serializers/post';
 
 const log = debug('misskey');
@@ -35,6 +36,15 @@ export default function homeStream(request: websocket.request, connection: webso
 		const msg = JSON.parse(data.utf8Data);
 
 		switch (msg.type) {
+			case 'alive':
+				// Update lastUsedAt
+				User.update({ _id: user._id }, {
+					$set: {
+						last_used_at: new Date()
+					}
+				});
+				break;
+
 			case 'capture':
 				if (!msg.id) return;
 				const postId = msg.id;
diff --git a/src/web/app/common/scripts/home-stream.js b/src/web/app/common/scripts/home-stream.js
index c54cbd7f19..de9ceb3b51 100644
--- a/src/web/app/common/scripts/home-stream.js
+++ b/src/web/app/common/scripts/home-stream.js
@@ -12,6 +12,11 @@ class Connection extends Stream {
 			i: me.token
 		});
 
+		// 最終利用日時を更新するため定期的にaliveメッセージを送信
+		setInterval(() => {
+			this.send({ type: 'alive' });
+		}, 1000 * 60);
+
 		this.on('i_updated', me.update);
 
 		this.on('my_token_regenerated', () => {