diff --git a/README.md b/README.md
index d5f2476..57d1861 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ Carthage
 -----------------
 Add this line to your `Cartfile`:
 ```
-github "socketio/socket.io-client-swift" ~> 2.4.0 # Or latest version
+github "socketio/socket.io-client-swift" ~> 2.4.3 # Or latest version
 ```
 
 Run `carthage update`.
@@ -80,7 +80,7 @@ source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 use_frameworks!
 
-pod 'Socket.IO-Client-Swift', '~> 2.4.0' # Or latest version
+pod 'Socket.IO-Client-Swift', '~> 2.4.3' # Or latest version
 ```
 
 Install pods:
diff --git a/Socket.IO-Client-Swift.podspec b/Socket.IO-Client-Swift.podspec
index 5ff6cbe..ed772a2 100644
--- a/Socket.IO-Client-Swift.podspec
+++ b/Socket.IO-Client-Swift.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "Socket.IO-Client-Swift"
-  s.version      = "2.4.0"
+  s.version      = "2.4.3"
   s.summary      = "Socket.IO-client for iOS and OS X"
   s.description  = <<-DESC
                    Socket.IO-client for iOS and OS X.
@@ -12,7 +12,7 @@ Pod::Spec.new do |s|
   s.author       = { "Erik" => "nuclear.ace@gmail.com" }
   s.ios.deployment_target = '8.0'
   s.osx.deployment_target = '10.10'
-  s.source       = { :git => "https://github.com/socketio/socket.io-client-swift.git", :tag => 'v2.4.0' }
+  s.source       = { :git => "https://github.com/socketio/socket.io-client-swift.git", :tag => 'v2.4.3' }
   s.source_files  = "SocketIOClientSwift/**/*.swift"
   s.requires_arc = true
   # s.dependency 'Starscream', '~> 0.9' # currently this repo includes Starscream swift files
diff --git a/SocketIOClientSwift/SocketEngine.swift b/SocketIOClientSwift/SocketEngine.swift
index dd3b3a9..4e0a5bf 100644
--- a/SocketIOClientSwift/SocketEngine.swift
+++ b/SocketIOClientSwift/SocketEngine.swift
@@ -387,25 +387,33 @@ public final class SocketEngine: NSObject, WebSocketDelegate, SocketLogClient {
 
     private func handleOpen(openData: String) {
         let mesData = openData.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!
-
         do {
             let json = try NSJSONSerialization.JSONObjectWithData(mesData,
                 options: NSJSONReadingOptions.AllowFragments) as? NSDictionary
             if let sid = json?["sid"] as? String {
+                let upgradeWs: Bool
+
                 self.sid = sid
                 connected = true
-
-                if !forcePolling && !forceWebsockets {
-                    createWebsocket(andConnect: true)
+                
+                if let upgrades = json?["upgrades"] as? [String] {
+                    upgradeWs = upgrades.filter {$0 == "websocket"}.count != 0
+                } else {
+                    upgradeWs = false
                 }
                 
                 if let pingInterval = json?["pingInterval"] as? Double, pingTimeout = json?["pingTimeout"] as? Double {
                     self.pingInterval = pingInterval / 1000.0
                     self.pingTimeout = pingTimeout / 1000.0
                 }
+                
+                if !forcePolling && !forceWebsockets && upgradeWs {
+                    createWebsocket(andConnect: true)
+                }
             }
         } catch {
             SocketLogger.err("Error parsing open packet", client: self)
+            return
         }
 
         startPingTimer()