diff --git a/Source/SocketIO/Client/SocketIOClientSpec.swift b/Source/SocketIO/Client/SocketIOClientSpec.swift
index 5015e44..3835412 100644
--- a/Source/SocketIO/Client/SocketIOClientSpec.swift
+++ b/Source/SocketIO/Client/SocketIOClientSpec.swift
@@ -26,7 +26,7 @@ import Dispatch
 import Foundation
 
 /// Defines the interface for a SocketIOClient.
-public protocol SocketIOClientSpec : class {
+public protocol SocketIOClientSpec : AnyObject {
     // MARK: Properties
 
     /// A handler that will be called on any event.
diff --git a/Source/SocketIO/Engine/SocketEngine.swift b/Source/SocketIO/Engine/SocketEngine.swift
index a1a80a1..738bf30 100644
--- a/Source/SocketIO/Engine/SocketEngine.swift
+++ b/Source/SocketIO/Engine/SocketEngine.swift
@@ -281,7 +281,7 @@ open class SocketEngine : NSObject, URLSessionDelegate, SocketEnginePollable, So
     private func createWebSocketAndConnect() {
         var req = URLRequest(url: urlWebSocketWithSid)
 
-        addHeaders(to: &req)
+        addHeaders(to: &req, includingCookies: session?.configuration.httpCookieStorage?.cookies)
 
         ws = WebSocket(request: req)
         ws?.callbackQueue = engineQueue
diff --git a/Source/SocketIO/Engine/SocketEngineSpec.swift b/Source/SocketIO/Engine/SocketEngineSpec.swift
index fa08519..4078535 100644
--- a/Source/SocketIO/Engine/SocketEngineSpec.swift
+++ b/Source/SocketIO/Engine/SocketEngineSpec.swift
@@ -155,11 +155,14 @@ extension SocketEngineSpec {
         return com.url!
     }
 
-    func addHeaders(to req: inout URLRequest) {
-        if let cookies = cookies {
-            req.allHTTPHeaderFields = HTTPCookie.requestHeaderFields(with: cookies)
+    func addHeaders(to req: inout URLRequest, includingCookies additionalCookies: [HTTPCookie]? = nil) {
+        var cookiesToAdd: [HTTPCookie] = cookies ?? []
+        cookiesToAdd += additionalCookies ?? []
+        
+        if !cookiesToAdd.isEmpty {
+            req.allHTTPHeaderFields = HTTPCookie.requestHeaderFields(with: cookiesToAdd)
         }
-
+        
         if let extraHeaders = extraHeaders {
             for (headerName, value) in extraHeaders {
                 req.setValue(value, forHTTPHeaderField: headerName)
diff --git a/Source/SocketIO/Manager/SocketManager.swift b/Source/SocketIO/Manager/SocketManager.swift
index cf88240..126aec1 100644
--- a/Source/SocketIO/Manager/SocketManager.swift
+++ b/Source/SocketIO/Manager/SocketManager.swift
@@ -392,7 +392,7 @@ open class SocketManager : NSObject, SocketManagerSpec, SocketParsable, SocketDa
 
     private func _parseEngineMessage(_ msg: String) {
         guard let packet = parseSocketMessage(msg) else { return }
-        guard packet.type != .binaryAck && packet.type != .binaryEvent else {
+        guard !packet.type.isBinary else {
             waitingPackets.append(packet)
 
             return
diff --git a/Source/SocketIO/Manager/SocketManagerSpec.swift b/Source/SocketIO/Manager/SocketManagerSpec.swift
index 79f0e98..4440193 100644
--- a/Source/SocketIO/Manager/SocketManagerSpec.swift
+++ b/Source/SocketIO/Manager/SocketManagerSpec.swift
@@ -46,7 +46,7 @@ import Foundation
 /// or call one of the `disconnectSocket` methods on this class.
 ///
 @objc
-public protocol SocketManagerSpec : class, SocketEngineClient {
+public protocol SocketManagerSpec : AnyObject, SocketEngineClient {
     // MARK: Properties
 
     /// Returns the socket associated with the default namespace ("/").
diff --git a/Source/SocketIO/Parse/SocketPacket.swift b/Source/SocketIO/Parse/SocketPacket.swift
index 4b316fc..e715d04 100644
--- a/Source/SocketIO/Parse/SocketPacket.swift
+++ b/Source/SocketIO/Parse/SocketPacket.swift
@@ -116,7 +116,7 @@ public struct SocketPacket : CustomStringConvertible {
     private func createPacketString() -> String {
         let typeString = String(type.rawValue)
         // Binary count?
-        let binaryCountString = typeString + (type == .binaryEvent || type == .binaryAck ? "\(String(binary.count))-" : "")
+        let binaryCountString = typeString + (type.isBinary ? "\(String(binary.count))-" : "")
         // Namespace?
         let nspString = binaryCountString + (nsp != "/" ? "\(nsp)," : "")
         // Ack number?
@@ -181,6 +181,13 @@ public extension SocketPacket {
 
         /// Binary Ack: 6
         case binaryAck
+
+        // MARK: Properties
+
+        /// Whether or not this type is binary
+        public var isBinary: Bool {
+            return self == .binaryAck || self == .binaryEvent
+        }
     }
 }
 
diff --git a/Source/SocketIO/Parse/SocketParsable.swift b/Source/SocketIO/Parse/SocketParsable.swift
index 5763e35..1c8b963 100644
--- a/Source/SocketIO/Parse/SocketParsable.swift
+++ b/Source/SocketIO/Parse/SocketParsable.swift
@@ -23,7 +23,7 @@
 import Foundation
 
 /// Defines that a type will be able to parse socket.io-protocol messages.
-public protocol SocketParsable : class {
+public protocol SocketParsable : AnyObject {
     // MARK: Methods
 
     /// Called when the engine has received some binary data that should be attached to a packet.
@@ -57,7 +57,7 @@ public enum SocketParsableError : Error {
 }
 
 /// Says that a type will be able to buffer binary data before all data for an event has come in.
-public protocol SocketDataBufferable : class {
+public protocol SocketDataBufferable : AnyObject {
     // MARK: Properties
 
     /// A list of packets that are waiting for binary data.
@@ -77,7 +77,7 @@ public extension SocketParsable where Self: SocketManagerSpec & SocketDataBuffer
     internal func parseString(_ message: String) throws -> SocketPacket {
         var reader = SocketStringReader(message: message)
 
-		guard let type = Int(reader.read(count: 1)).flatMap({ SocketPacket.PacketType(rawValue: $0) }) else {
+        guard let type = Int(reader.read(count: 1)).flatMap({ SocketPacket.PacketType(rawValue: $0) }) else {
             throw SocketParsableError.invalidPacketType
         }
 
@@ -88,7 +88,7 @@ public extension SocketParsable where Self: SocketManagerSpec & SocketDataBuffer
         var namespace = "/"
         var placeholders = -1
 
-        if type == .binaryEvent || type == .binaryAck {
+        if type.isBinary {
             if let holders = Int(reader.readUntilOccurence(of: "-")) {
                 placeholders = holders
             } else {
diff --git a/Source/SocketIO/Util/SocketLogger.swift b/Source/SocketIO/Util/SocketLogger.swift
index 46e3f1b..69293fb 100644
--- a/Source/SocketIO/Util/SocketLogger.swift
+++ b/Source/SocketIO/Util/SocketLogger.swift
@@ -25,7 +25,7 @@
 import Foundation
 
 /// Represents a class will log client events.
-public protocol SocketLogger : class {
+public protocol SocketLogger : AnyObject {
     // MARK: Properties
 
     /// Whether to log or not