diff --git a/example/typescript/package.json b/example/typescript/package.json
index 57a1e0d5c..bb503ca22 100644
--- a/example/typescript/package.json
+++ b/example/typescript/package.json
@@ -6,7 +6,10 @@
   "author": "h3poteto",
   "license": "MIT",
   "dependencies": {
-    "typescript": "^3.4.5",
-    "megalodon": "file:../../"
+    "megalodon": "file:../../",
+    "typescript": "^3.4.5"
+  },
+  "devDependencies": {
+    "log4js": "^5.2.2"
   }
 }
diff --git a/example/typescript/streaming.ts b/example/typescript/streaming.ts
index a912329f4..c8aebffe8 100644
--- a/example/typescript/streaming.ts
+++ b/example/typescript/streaming.ts
@@ -12,7 +12,7 @@ const access_token: string = process.env.MASTODON_ACCESS_TOKEN
 
 const client = new Mastodon(access_token, BASE_URL + '/api/v1')
 
-const stream: StreamListener = client.stream('/streaming/public')
+const stream: StreamListener = client.stream('/streaming/user')
 stream.on('connect', _ => {
   console.log('connect')
 })
diff --git a/example/typescript/web_socket.ts b/example/typescript/web_socket.ts
index 2e9dc81f3..1f97c2d7c 100644
--- a/example/typescript/web_socket.ts
+++ b/example/typescript/web_socket.ts
@@ -1,8 +1,10 @@
 import Mastodon, { Status, Notification, WebSocket } from 'megalodon'
+import log4js from 'log4js'
 
 declare var process: {
   env: {
     PLEROMA_ACCESS_TOKEN: string
+    MASTODON_ACCESS_TOKEN: string
   }
 }
 
@@ -13,20 +15,27 @@ const access_token: string = process.env.PLEROMA_ACCESS_TOKEN
 const client = new Mastodon(access_token, BASE_URL + '/api/v1')
 
 const stream: WebSocket = client.socket('/streaming', 'user')
+
+const logger = log4js.getLogger()
+logger.level = 'debug'
 stream.on('connect', () => {
-  console.log('connect')
+  logger.debug('connect')
+})
+
+stream.on('pong', () => {
+  logger.debug('pong')
 })
 
 stream.on('update', (status: Status) => {
-  console.log(status)
+  logger.debug(status)
 })
 
 stream.on('notification', (notification: Notification) => {
-  console.log(notification)
+  logger.debug(notification)
 })
 
 stream.on('delete', (id: number) => {
-  console.log(id)
+  logger.debug(id)
 })
 
 stream.on('error', (err: Error) => {
@@ -34,13 +43,13 @@ stream.on('error', (err: Error) => {
 })
 
 stream.on('heartbeat', () => {
-  console.log('thump.')
+  logger.debug('thump.')
 })
 
 stream.on('close', () => {
-  console.log('close')
+  logger.debug('close')
 })
 
 stream.on('parser-error', (err: Error) => {
-  console.error(err)
+  logger.error(err)
 })
diff --git a/example/typescript/yarn.lock b/example/typescript/yarn.lock
index a7e19782b..f76cbfa0e 100644
--- a/example/typescript/yarn.lock
+++ b/example/typescript/yarn.lock
@@ -141,6 +141,11 @@ dashdash@^1.12.0:
   dependencies:
     assert-plus "^1.0.0"
 
+date-format@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/date-format/-/date-format-2.1.0.tgz#31d5b5ea211cf5fd764cd38baf9d033df7e125cf"
+  integrity sha512-bYQuGLeFxhkxNOF3rcMtiZxvCBAquGzZm6oWA1oZ0g2THUzivaRhv8uOhdr19LmoobSOLoIAxeUK2RdbM8IFTA==
+
 debug@=3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
@@ -148,6 +153,13 @@ debug@=3.1.0:
   dependencies:
     ms "2.0.0"
 
+debug@^4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
+  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
+  dependencies:
+    ms "^2.1.1"
+
 delayed-stream@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
@@ -186,6 +198,11 @@ fast-json-stable-stringify@^2.0.0:
   resolved "https://registry.yarnpkg.com/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz#d5142c0caee6b1189f87d3a76111064f86c8bbf2"
   integrity sha1-1RQsDK7msRifh9OnYREGT4bIu/I=
 
+flatted@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/flatted/-/flatted-2.0.1.tgz#69e57caa8f0eacbc281d2e2cb458d46fdb449e08"
+  integrity sha512-a1hQMktqW9Nmqr5aktAux3JMNqaucxGcjtjWnZLHX7yyPCmlSV3M54nGYbqT8K+0GhF3NBgmJCc3ma+WOgX8Jg==
+
 follow-redirects@1.5.10:
   version "1.5.10"
   resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.5.10.tgz#7b7a9f9aea2fdff36786a94ff643ed07f4ff5e2a"
@@ -207,6 +224,15 @@ form-data@~2.3.2:
     combined-stream "1.0.6"
     mime-types "^2.1.12"
 
+fs-extra@^8.1.0:
+  version "8.1.0"
+  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-8.1.0.tgz#49d43c45a88cd9677668cb7be1b46efdb8d2e1c0"
+  integrity sha512-yhlQgA6mnOJUKOsRUFsgJdQCvkKhcz8tlZG5HBQfReYZy46OwLcY+Zia0mtdHsOo9y/hP+CxMN0TU9QxoOtG4g==
+  dependencies:
+    graceful-fs "^4.2.0"
+    jsonfile "^4.0.0"
+    universalify "^0.1.0"
+
 getpass@^0.1.1:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/getpass/-/getpass-0.1.7.tgz#5eff8e3e684d569ae4cb2b1282604e8ba62149fa"
@@ -214,6 +240,11 @@ getpass@^0.1.1:
   dependencies:
     assert-plus "^1.0.0"
 
+graceful-fs@^4.1.6, graceful-fs@^4.2.0:
+  version "4.2.2"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.2.tgz#6f0952605d0140c1cfdb138ed005775b92d67b02"
+  integrity sha512-IItsdsea19BoLC7ELy13q1iJFNmd7ofZH5+X/pJr90/nRoPEX0DJo1dHDbgtYWOhJhcCgMDTOw84RZ72q6lB+Q==
+
 har-schema@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/har-schema/-/har-schema-2.0.0.tgz#a94c2224ebcac04782a0d9035521f24735b7ec92"
@@ -271,6 +302,13 @@ json-stringify-safe@~5.0.1:
   resolved "https://registry.yarnpkg.com/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz#1296a2d58fd45f19a0f6ce01d65701e2c735b6eb"
   integrity sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus=
 
+jsonfile@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-4.0.0.tgz#8771aae0799b64076b76640fca058f9c10e33ecb"
+  integrity sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=
+  optionalDependencies:
+    graceful-fs "^4.1.6"
+
 jsprim@^1.2.2:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/jsprim/-/jsprim-1.4.1.tgz#313e66bc1e5cc06e438bc1b7499c2e5c56acb6a2"
@@ -281,13 +319,25 @@ jsprim@^1.2.2:
     json-schema "0.2.3"
     verror "1.10.0"
 
+log4js@^5.2.2:
+  version "5.2.2"
+  resolved "https://registry.yarnpkg.com/log4js/-/log4js-5.2.2.tgz#35b750416f22913dd6905d49335752d9b240f47c"
+  integrity sha512-Iw4ZjbYTMxSTh1jnXM2brpRIr+psM8/nkUiOHu2gFfd0saoX2NdRB69buMWJJuoIJfU/eTzqKy9rVBr0zQwSGQ==
+  dependencies:
+    date-format "^2.1.0"
+    debug "^4.1.1"
+    flatted "^2.0.1"
+    rfdc "^1.1.4"
+    streamroller "^2.2.2"
+
 "megalodon@file:../..":
-  version "0.9.0"
+  version "1.0.3"
   dependencies:
     "@types/oauth" "^0.9.0"
     "@types/request" "^2.47.0"
     "@types/ws" "^6.0.1"
     axios "^0.18.1"
+    moment "^2.24.0"
     oauth "^0.9.15"
     request "^2.87.0"
     typescript "^3.4.5"
@@ -305,11 +355,21 @@ mime-types@^2.1.12, mime-types@~2.1.19:
   dependencies:
     mime-db "~1.36.0"
 
+moment@^2.24.0:
+  version "2.24.0"
+  resolved "https://registry.yarnpkg.com/moment/-/moment-2.24.0.tgz#0d055d53f5052aa653c9f6eb68bb5d12bf5c2b5b"
+  integrity sha512-bV7f+6l2QigeBBZSM/6yTNq4P2fNpSWj/0e7jQcy87A8e7o2nAfP/34/2ky5Vw4B9S446EtIhodAzkFCcR4dQg==
+
 ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
   integrity sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=
 
+ms@^2.1.1:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
+  integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
+
 oauth-sign@~0.9.0:
   version "0.9.0"
   resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.9.0.tgz#47a7b016baa68b5fa0ecf3dee08a85c679ac6455"
@@ -366,6 +426,11 @@ request@^2.87.0:
     tunnel-agent "^0.6.0"
     uuid "^3.3.2"
 
+rfdc@^1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/rfdc/-/rfdc-1.1.4.tgz#ba72cc1367a0ccd9cf81a870b3b58bd3ad07f8c2"
+  integrity sha512-5C9HXdzK8EAqN7JDif30jqsBzavB7wLpaubisuQIGHWf2gUXSpzy6ArX/+Da8RjFpagWsCn+pIgxTMAmKw9Zug==
+
 safe-buffer@^5.0.1, safe-buffer@^5.1.2:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
@@ -392,6 +457,15 @@ sshpk@^1.7.0:
     jsbn "~0.1.0"
     tweetnacl "~0.14.0"
 
+streamroller@^2.2.2:
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/streamroller/-/streamroller-2.2.2.tgz#26bea90567f80d8438d251e5603643fe617b7090"
+  integrity sha512-wizmZ8NNiqeNIYHv8MqBBbSIeNNcsXyoKxbGYBpiFHCjTGlNHqGNGElwrSM3Awg+0j6U96/eFrSnjW+h3aRo0Q==
+  dependencies:
+    date-format "^2.1.0"
+    debug "^4.1.1"
+    fs-extra "^8.1.0"
+
 tough-cookie@~2.4.3:
   version "2.4.3"
   resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.4.3.tgz#53f36da3f47783b0925afa06ff9f3b165280f781"
@@ -417,6 +491,11 @@ typescript@^3.4.5:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.3.tgz#c830f657f93f1ea846819e929092f5fe5983e977"
   integrity sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g==
 
+universalify@^0.1.0:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/universalify/-/universalify-0.1.2.tgz#b646f69be3942dabcecc9d6639c80dc105efaa66"
+  integrity sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==
+
 uuid@^3.3.2:
   version "3.3.2"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"
diff --git a/package.json b/package.json
index eb65c585e..be73e66e0 100644
--- a/package.json
+++ b/package.json
@@ -54,6 +54,7 @@
     "@types/request": "^2.47.0",
     "@types/ws": "^6.0.1",
     "axios": "^0.18.1",
+    "moment": "^2.24.0",
     "oauth": "^0.9.15",
     "request": "^2.87.0",
     "typescript": "^3.4.5",
diff --git a/src/web_socket.ts b/src/web_socket.ts
index 4b6a23465..33cac9bce 100644
--- a/src/web_socket.ts
+++ b/src/web_socket.ts
@@ -1,4 +1,5 @@
 import WS from 'ws'
+import moment, { Moment } from 'moment'
 import { EventEmitter } from 'events'
 import { Status } from './entities/status'
 import { Notification } from './entities/notification'
@@ -20,6 +21,9 @@ export default class WebSocket extends EventEmitter {
   private _reconnectCurrentAttempts: number
   private _connectionClosed: boolean
   private _client: WS | null
+  private _pongReceivedTimestamp: Moment
+  private _heartbeatInterval: number = 60000
+  private _pongWaiting: boolean = false
 
   /**
    * @param url Full url of websocket: e.g. https://pleroma.io/api/v1/streaming
@@ -41,6 +45,7 @@ export default class WebSocket extends EventEmitter {
     this._reconnectCurrentAttempts = 0
     this._connectionClosed = false
     this._client = null
+    this._pongReceivedTimestamp = moment()
   }
 
   /**
@@ -104,6 +109,7 @@ export default class WebSocket extends EventEmitter {
           // Call connect methods
           console.log('Reconnecting')
           this._client = this._connect(this.url, this.stream, this._accessToken, this.headers)
+          this._clearBinding()
           this._bindSocket(this._client)
         }
       }, this._reconnectInterval)
@@ -132,6 +138,19 @@ export default class WebSocket extends EventEmitter {
     return cli
   }
 
+  /**
+   * Clear binding event for web socket client.
+   */
+  private _clearBinding() {
+    if (this._client) {
+      this._client.removeAllListeners('close')
+      this._client.removeAllListeners('pong')
+      this._client.removeAllListeners('open')
+      this._client.removeAllListeners('message')
+      this._client.removeAllListeners('error')
+    }
+  }
+
   /**
    * Bind event for web socket client.
    * @param client A WebSocket instance.
@@ -149,8 +168,19 @@ export default class WebSocket extends EventEmitter {
         }
       }
     })
+    client.on('pong', () => {
+      this._pongWaiting = false
+      this.emit('pong', {})
+      this._pongReceivedTimestamp = moment()
+      // It is required to anonymous function since get this scope in checkAlive.
+      setTimeout(() => this._checkAlive(this._pongReceivedTimestamp), this._heartbeatInterval)
+    })
     client.on('open', () => {
       this.emit('connect', {})
+      // Call first ping event.
+      setTimeout(() => {
+        client.ping('')
+      }, 10000)
     })
     client.on('message', (data: WS.Data) => {
       this.parser.parse(data)
@@ -183,6 +213,27 @@ export default class WebSocket extends EventEmitter {
       this.emit('heartbeat', 'heartbeat')
     })
   }
+
+  /**
+   * Call ping and wait to pong.
+   */
+  private _checkAlive(timestamp: Moment) {
+    const now: Moment = moment()
+    // Block multiple calling, if multiple pong event occur.
+    // It the duration is less than interval, through ping.
+    if (now.diff(timestamp) > this._heartbeatInterval - 1000 && !this._connectionClosed) {
+      if (this._client) {
+        this._pongWaiting = true
+        this._client.ping('')
+      }
+      setTimeout(() => {
+        if (this._pongWaiting) {
+          this._pongWaiting = false
+          this._reconnect()
+        }
+      }, 10000)
+    }
+  }
 }
 
 /**
diff --git a/yarn.lock b/yarn.lock
index dc1545a6a..5dac188ec 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2882,6 +2882,11 @@ mkdirp@0.x, mkdirp@^0.5.0, mkdirp@^0.5.1:
   dependencies:
     minimist "0.0.8"
 
+moment@^2.24.0:
+  version "2.24.0"
+  resolved "https://registry.yarnpkg.com/moment/-/moment-2.24.0.tgz#0d055d53f5052aa653c9f6eb68bb5d12bf5c2b5b"
+  integrity sha512-bV7f+6l2QigeBBZSM/6yTNq4P2fNpSWj/0e7jQcy87A8e7o2nAfP/34/2ky5Vw4B9S446EtIhodAzkFCcR4dQg==
+
 ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"