diff --git a/package.json b/package.json
index 6b6da70..3047c5d 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "oauth": "^0.9.15",
     "socks-proxy-agent": "h3poteto/node-socks-proxy-agent#master",
     "typescript": "3.5.3",
-    "ws": "^7.0.1"
+    "ws": "^7.2.1"
   },
   "devDependencies": {
     "@types/core-js": "^2.5.0",
diff --git a/src/web_socket.ts b/src/web_socket.ts
index af2723b..a0bc17e 100644
--- a/src/web_socket.ts
+++ b/src/web_socket.ts
@@ -44,7 +44,7 @@ export default class WebSocket extends EventEmitter {
     }
     this.proxyConfig = proxyConfig
     this._accessToken = accessToken
-    this._reconnectInterval = 1000
+    this._reconnectInterval = 10000
     this._reconnectMaxAttempts = Infinity
     this._reconnectCurrentAttempts = 0
     this._connectionClosed = false
@@ -106,23 +106,27 @@ export default class WebSocket extends EventEmitter {
    * Reconnects to the same endpoint.
    */
   private _reconnect() {
-    if (this._client) {
-      setTimeout(() => {
-        if (this._reconnectCurrentAttempts < this._reconnectMaxAttempts) {
-          this._reconnectCurrentAttempts++
-          this._clearBinding()
-          if (this._client) {
-            // In reconnect, we want to close the connection immediately,
-            // because recoonect is necessary when some problems occur.
-            this._client.terminate()
-          }
-          // Call connect methods
-          console.log('Reconnecting')
-          this._client = this._connect(this.url, this.stream, this._accessToken, this.headers, this.proxyConfig)
-          this._bindSocket(this._client)
+    setTimeout(() => {
+      // Skip reconnect when client is connecting.
+      // https://github.com/websockets/ws/blob/7.2.1/lib/websocket.js#L365
+      if (this._client && this._client.readyState === WS.CONNECTING) {
+        return
+      }
+
+      if (this._reconnectCurrentAttempts < this._reconnectMaxAttempts) {
+        this._reconnectCurrentAttempts++
+        this._clearBinding()
+        if (this._client) {
+          // In reconnect, we want to close the connection immediately,
+          // because recoonect is necessary when some problems occur.
+          this._client.terminate()
         }
-      }, this._reconnectInterval)
-    }
+        // Call connect methods
+        console.log('Reconnecting')
+        this._client = this._connect(this.url, this.stream, this._accessToken, this.headers, this.proxyConfig)
+        this._bindSocket(this._client)
+      }
+    }, this._reconnectInterval)
   }
 
   /**
@@ -243,16 +247,18 @@ export default class WebSocket extends EventEmitter {
     // 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) {
+      // Skip ping when client is connecting.
+      // https://github.com/websockets/ws/blob/7.2.1/lib/websocket.js#L289
+      if (this._client && this._client.readyState !== WS.CONNECTING) {
         this._pongWaiting = true
         this._client.ping('')
+        setTimeout(() => {
+          if (this._pongWaiting) {
+            this._pongWaiting = false
+            this._reconnect()
+          }
+        }, 10000)
       }
-      setTimeout(() => {
-        if (this._pongWaiting) {
-          this._pongWaiting = false
-          this._reconnect()
-        }
-      }, 10000)
     }
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 9bb5fc9..9eeab4e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -643,7 +643,7 @@ astral-regex@^1.0.0:
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-1.0.0.tgz#6c8c3fb827dd43ee3918f27b82782ab7658a6fd9"
   integrity sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==
 
-async-limiter@^1.0.0, async-limiter@~1.0.0:
+async-limiter@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.0.tgz#78faed8c3d074ab81f22b4e985d79e8738f720f8"
   integrity sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg==
@@ -4404,12 +4404,10 @@ ws@^5.2.0:
   dependencies:
     async-limiter "~1.0.0"
 
-ws@^7.0.1:
-  version "7.2.0"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-7.2.0.tgz#422eda8c02a4b5dba7744ba66eebbd84bcef0ec7"
-  integrity sha512-+SqNqFbwTm/0DC18KYzIsMTnEWpLwJsiasW/O17la4iDRRIO9uaHbvKiAS3AHgTiuuWerK/brj4O6MYZkei9xg==
-  dependencies:
-    async-limiter "^1.0.0"
+ws@^7.2.1:
+  version "7.2.1"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-7.2.1.tgz#03ed52423cd744084b2cf42ed197c8b65a936b8e"
+  integrity sha512-sucePNSafamSKoOqoNfBd8V0StlkzJKL2ZAhGQinCfNQ+oacw+Pk7lcdAElecBF2VkLNZRiIb5Oi1Q5lVUVt2A==
 
 xml-name-validator@^3.0.0:
   version "3.0.0"