diff --git a/SocketIOClientSwift/SocketIOClient.swift b/SocketIOClientSwift/SocketIOClient.swift
index e93d672..5b83603 100644
--- a/SocketIOClientSwift/SocketIOClient.swift
+++ b/SocketIOClientSwift/SocketIOClient.swift
@@ -24,7 +24,7 @@
 
 import Foundation
 
-public class SocketIOClient: NSObject, SocketEngineClient {
+public final class SocketIOClient: NSObject, SocketEngineClient {
     private lazy var params = [String: AnyObject]()
     private var anyHandler:((SocketAnyEvent) -> Void)?
     private var _closed = false
diff --git a/SocketIOClientSwift/SocketPacket.swift b/SocketIOClientSwift/SocketPacket.swift
index db792a6..bc7a126 100644
--- a/SocketIOClientSwift/SocketPacket.swift
+++ b/SocketIOClientSwift/SocketPacket.swift
@@ -24,7 +24,7 @@
 
 import Foundation
 
-class SocketPacket {
+final class SocketPacket {
     var binary = ContiguousArray<NSData>()
     var currentPlace = 0
     var data:[AnyObject]?