diff --git a/lib/Client/InternalClient.js b/lib/Client/InternalClient.js
index e680069ba..3c082df9c 100644
--- a/lib/Client/InternalClient.js
+++ b/lib/Client/InternalClient.js
@@ -86,7 +86,7 @@ var _UtilTokenCacher = require("../Util/TokenCacher");
 
 var _UtilTokenCacher2 = _interopRequireDefault(_UtilTokenCacher);
 
-var GATEWAY_VERSION = 4;
+var GATEWAY_VERSION = 5;
 var zlib;
 var libVersion = require('../../package.json').version;
 
@@ -1806,13 +1806,7 @@ var InternalClient = (function () {
 
 		this.websocket = new _ws2["default"](url);
 
-		this.websocket.onopen = function () {
-			if (_this36.sessionID) {
-				_this36.resume();
-			} else {
-				_this36.identify();
-			}
-		};
+		this.websocket.onopen = function () {};
 
 		this.websocket.onclose = function (event) {
 			_this36.websocket = null;
@@ -1889,52 +1883,28 @@ var InternalClient = (function () {
 					_this36.sequence = 0;
 					_this36.identify();
 					break;
+				case 10:
+					console.log(packet);
+					if (_this36.sessionID) {
+						_this36.resume();
+					} else {
+						_this36.identify();
+					}
+					_this36.heartbeat();
+					_this36.intervals.kai = setInterval(function () {
+						return _this36.heartbeat();
+					}, packet.d.heartbeat_interval);
+					break;
+				case 11:
+					_this36.heartbeatAcked = true;
+					break;
+				default:
+					_this36.client.emit("unknown", packet);
+					break;
 			}
 		};
 	};
 
-	InternalClient.prototype.resume = function resume() {
-		var data = {
-			op: 6,
-			d: {
-				token: this.token,
-				session_id: this.sessionID,
-				seq: this.sequence
-			}
-		};
-
-		this.sendWS(data);
-	};
-
-	InternalClient.prototype.identify = function identify() {
-		var data = {
-			op: 2,
-			d: {
-				token: this.token,
-				v: GATEWAY_VERSION,
-				compress: this.client.options.compress,
-				large_threshold: this.client.options.largeThreshold,
-				properties: {
-					"$os": process.platform,
-					"$browser": "discord.js",
-					"$device": "discord.js",
-					"$referrer": "",
-					"$referring_domain": ""
-				}
-			}
-		};
-
-		if (this.client.options.shard) {
-			data.d.shard = this.client.options.shard;
-		}
-
-		this.sendWS(data);
-	};
-
-	InternalClient.prototype.heartbeat = function heartbeat() {
-		this.sendWS({ op: 1, d: Date.now() });
-	};
-
 	InternalClient.prototype.processPacket = function processPacket(packet) {
 		var _this37 = this;
 
@@ -1943,9 +1913,8 @@ var InternalClient = (function () {
 		switch (packet.t) {
 			case _Constants.PacketType.RESUME:
 			case _Constants.PacketType.READY:
-				this.intervals.kai = setInterval(function () {
-					return _this37.heartbeat();
-				}, data.heartbeat_interval);
+				this.autoReconnectInterval = 1000;
+				this.state = _ConnectionState2["default"].READY;
 
 				if (packet.t === _Constants.PacketType.RESUME) {
 					break;
@@ -1959,7 +1928,6 @@ var InternalClient = (function () {
 				this.forceFetchCount = {};
 				this.forceFetchQueue = [];
 				this.forceFetchLength = 1;
-				this.autoReconnectInterval = 1000;
 
 				data.guilds.forEach(function (server) {
 					if (!server.unavailable) {
@@ -2016,8 +1984,6 @@ var InternalClient = (function () {
 					}
 				}
 
-				this.state = _ConnectionState2["default"].READY;
-
 				client.emit("debug", "ready packet took " + (Date.now() - startTime) + "ms to process");
 				client.emit("debug", "ready with " + this.servers.length + " servers, " + this.unavailableServers.length + " unavailable servers, " + this.channels.length + " channels and " + this.users.length + " users cached.");
 
@@ -2060,6 +2026,23 @@ var InternalClient = (function () {
 					client.emit("warn", "message was deleted but channel is not cached");
 				}
 				break;
+			case _Constants.PacketType.MESSAGE_DELETE_BULK:
+				var channel = this.channels.get("id", data.channel_id) || this.private_channels.get("id", data.channel_id);
+				if (channel) {
+					data.ids.forEach(function (id) {
+						// potentially blank
+						var msg = channel.messages.get("id", id);
+						client.emit("messageDeleted", msg, channel);
+						if (msg) {
+							channel.messages.remove(msg);
+						} else {
+							client.emit("debug", "message was deleted but message is not cached");
+						}
+					});
+				} else {
+					client.emit("warn", "message was deleted but channel is not cached");
+				}
+				break;
 			case _Constants.PacketType.MESSAGE_UPDATE:
 				// format https://discordapi.readthedocs.org/en/latest/reference/channels/messages.html#message-format
 				var channel = this.channels.get("id", data.channel_id) || this.private_channels.get("id", data.channel_id);
@@ -2670,6 +2653,48 @@ var InternalClient = (function () {
 		}
 	};
 
+	InternalClient.prototype.resume = function resume() {
+		var data = {
+			op: 6,
+			d: {
+				token: this.token,
+				session_id: this.sessionID,
+				seq: this.sequence
+			}
+		};
+
+		this.sendWS(data);
+	};
+
+	InternalClient.prototype.identify = function identify() {
+		var data = {
+			op: 2,
+			d: {
+				token: this.token,
+				v: GATEWAY_VERSION,
+				compress: this.client.options.compress,
+				large_threshold: this.client.options.largeThreshold,
+				properties: {
+					"$os": process.platform,
+					"$browser": "discord.js",
+					"$device": "discord.js",
+					"$referrer": "",
+					"$referring_domain": ""
+				}
+			}
+		};
+
+		if (this.client.options.shard) {
+			data.d.shard = this.client.options.shard;
+		}
+
+		this.sendWS(data);
+	};
+
+	InternalClient.prototype.heartbeat = function heartbeat() {
+		this.sendWS({ op: 1, d: Date.now() });
+	};
+
 	_createClass(InternalClient, [{
 		key: "uptime",
 		get: function get() {
diff --git a/lib/Constants.js b/lib/Constants.js
index bb40cbd59..b6807521d 100644
--- a/lib/Constants.js
+++ b/lib/Constants.js
@@ -134,6 +134,7 @@ Constants.PacketType = {
 	CHANNEL_UPDATE: "CHANNEL_UPDATE",
 	MESSAGE_CREATE: "MESSAGE_CREATE",
 	MESSAGE_DELETE: "MESSAGE_DELETE",
+	MESSAGE_DELETE_BULK: "MESSAGE_DELETE_BULK",
 	MESSAGE_UPDATE: "MESSAGE_UPDATE",
 	PRESENCE_UPDATE: "PRESENCE_UPDATE",
 	READY: "READY",
diff --git a/src/Client/InternalClient.js b/src/Client/InternalClient.js
index a1631e1a3..903b1acc4 100755
--- a/src/Client/InternalClient.js
+++ b/src/Client/InternalClient.js
@@ -24,7 +24,7 @@ import Invite from "../Structures/Invite";
 import VoiceConnection from "../Voice/VoiceConnection";
 import TokenCacher from "../Util/TokenCacher";
 
-var GATEWAY_VERSION = 4;
+var GATEWAY_VERSION = 5;
 var zlib;
 var libVersion = require('../../package.json').version;
 
@@ -1578,11 +1578,6 @@ export default class InternalClient {
 		this.websocket = new WebSocket(url);
 
 		this.websocket.onopen = () => {
-			if(this.sessionID) {
-				this.resume();
-			} else {
-				this.identify();
-			}
 		};
 
 		this.websocket.onclose = (event) => {
@@ -1660,59 +1655,34 @@ export default class InternalClient {
 					this.sequence = 0;
 					this.identify();
 					break;
+				case 10:
+					console.log(packet);
+					if(this.sessionID) {
+						this.resume();
+					} else {
+						this.identify();
+					}
+					this.heartbeat();
+					this.intervals.kai = setInterval(() => this.heartbeat(), packet.d.heartbeat_interval);
+					break;
+				case 11:
+					this.heartbeatAcked = true;
+					break;
+				default:
+					this.client.emit("unknown", packet);
+					break;
 			}
 		};
 	}
 
-	resume() {
-		var data = {
-			op: 6,
-			d: {
-	            token: this.token,
-	            session_id: this.sessionID,
-	            seq: this.sequence
-			}
-		};
-
-		this.sendWS(data);
-	}
-
-	identify() {
-		var data = {
-			op: 2,
-			d: {
-				token: this.token,
-				v: GATEWAY_VERSION,
-				compress: this.client.options.compress,
-				large_threshold : this.client.options.largeThreshold,
-				properties: {
-					"$os": process.platform,
-					"$browser": "discord.js",
-					"$device": "discord.js",
-					"$referrer": "",
-					"$referring_domain": ""
-				}
-			}
-		};
-
-		if (this.client.options.shard) {
-			data.d.shard = this.client.options.shard;
-		}
-
-		this.sendWS(data);
-	}
-
-	heartbeat() {
-		this.sendWS({ op: 1, d: Date.now() });
-	}
-
 	processPacket(packet) {
 		var client = this.client;
 		var data = packet.d;
 		switch (packet.t) {
 			case PacketType.RESUME:
 			case PacketType.READY:
-				this.intervals.kai = setInterval(() => this.heartbeat(), data.heartbeat_interval);
+				this.autoReconnectInterval = 1000;
+				this.state = ConnectionState.READY;
 
 				if(packet.t === PacketType.RESUME) {
 					break;
@@ -1726,7 +1696,6 @@ export default class InternalClient {
 				this.forceFetchCount = {};
 				this.forceFetchQueue = [];
 				this.forceFetchLength = 1;
-				this.autoReconnectInterval = 1000;
 
 				data.guilds.forEach(server => {
 					if (!server.unavailable) {
@@ -1778,9 +1747,6 @@ export default class InternalClient {
 					}
 				}
 
-
-				this.state = ConnectionState.READY;
-
 				client.emit("debug", `ready packet took ${Date.now() - startTime}ms to process`);
 				client.emit("debug", `ready with ${this.servers.length} servers, ${this.unavailableServers.length} unavailable servers, ${this.channels.length} channels and ${this.users.length} users cached.`);
 
@@ -1821,6 +1787,23 @@ export default class InternalClient {
 					client.emit("warn", "message was deleted but channel is not cached");
 				}
 				break;
+			case PacketType.MESSAGE_DELETE_BULK:
+				var channel = this.channels.get("id", data.channel_id) || this.private_channels.get("id", data.channel_id);
+				if (channel) {
+					data.ids.forEach((id) => {
+						// potentially blank
+						var msg = channel.messages.get("id", id);
+						client.emit("messageDeleted", msg, channel);
+						if (msg) {
+							channel.messages.remove(msg);
+						} else {
+							client.emit("debug", "message was deleted but message is not cached");
+						}
+					});
+				} else {
+					client.emit("warn", "message was deleted but channel is not cached");
+				}
+				break;
 			case PacketType.MESSAGE_UPDATE:
 				// format https://discordapi.readthedocs.org/en/latest/reference/channels/messages.html#message-format
 				var channel = this.channels.get("id", data.channel_id) || this.private_channels.get("id", data.channel_id);
@@ -2391,4 +2374,46 @@ export default class InternalClient {
 				break;
 		}
 	}
+
+	resume() {
+		var data = {
+			op: 6,
+			d: {
+	            token: this.token,
+	            session_id: this.sessionID,
+	            seq: this.sequence
+			}
+		};
+
+		this.sendWS(data);
+	}
+
+	identify() {
+		var data = {
+			op: 2,
+			d: {
+				token: this.token,
+				v: GATEWAY_VERSION,
+				compress: this.client.options.compress,
+				large_threshold : this.client.options.largeThreshold,
+				properties: {
+					"$os": process.platform,
+					"$browser": "discord.js",
+					"$device": "discord.js",
+					"$referrer": "",
+					"$referring_domain": ""
+				}
+			}
+		};
+
+		if (this.client.options.shard) {
+			data.d.shard = this.client.options.shard;
+		}
+
+		this.sendWS(data);
+	}
+
+	heartbeat() {
+		this.sendWS({ op: 1, d: Date.now() });
+	}
 }
diff --git a/src/Constants.js b/src/Constants.js
index 4e142d5c9..dffa52204 100644
--- a/src/Constants.js
+++ b/src/Constants.js
@@ -87,6 +87,7 @@ Constants.PacketType = {
 	CHANNEL_UPDATE : "CHANNEL_UPDATE",
 	MESSAGE_CREATE : "MESSAGE_CREATE",
 	MESSAGE_DELETE : "MESSAGE_DELETE",
+	MESSAGE_DELETE_BULK : "MESSAGE_DELETE_BULK",
 	MESSAGE_UPDATE : "MESSAGE_UPDATE",
 	PRESENCE_UPDATE : "PRESENCE_UPDATE",
 	READY : "READY",