diff --git a/Source/SocketEnginePollable.swift b/Source/SocketEnginePollable.swift
index 569db51..e3e9248 100644
--- a/Source/SocketEnginePollable.swift
+++ b/Source/SocketEnginePollable.swift
@@ -120,7 +120,7 @@ extension SocketEnginePollable {
         doLongPoll(for: req)
     }
 
-    func doRequest(for req: URLRequest, callbackWith callback: @escaping (Data?, URLResponse?, Error?) -> Void) {
+    func doRequest(for req: URLRequest, callbackWith callback: @escaping (Data?, URLResponse?, Error?) -> ()) {
         guard polling && !closed && !invalidated && !fastUpgrade else { return }
 
         DefaultSocketLogger.Logger.log("Doing polling %@ %@", type: "SocketEnginePolling",
diff --git a/Source/SocketIOClient.swift b/Source/SocketIOClient.swift
index 23b69b0..1a43b54 100644
--- a/Source/SocketIOClient.swift
+++ b/Source/SocketIOClient.swift
@@ -89,7 +89,7 @@ open class SocketIOClient : NSObject, SocketIOClientSpec, SocketEngineClient, So
 
     private let logType = "SocketIOClient"
 
-    private var anyHandler: ((SocketAnyEvent) -> Void)?
+    private var anyHandler: ((SocketAnyEvent) -> ())?
     private var currentReconnectAttempt = 0
     private var handlers = [SocketEventHandler]()
     private var reconnecting = false
@@ -169,7 +169,7 @@ open class SocketIOClient : NSObject, SocketIOClientSpec, SocketEngineClient, So
     /// - parameter timeoutAfter: The number of seconds after which if we are not connected we assume the connection
     ///                           has failed. Pass 0 to never timeout.
     /// - parameter withHandler: The handler to call when the client fails to connect.
-    open func connect(timeoutAfter: Int, withHandler handler: (() -> Void)?) {
+    open func connect(timeoutAfter: Int, withHandler handler: (() -> ())?) {
         assert(timeoutAfter >= 0, "Invalid timeout: \(timeoutAfter)")
 
         guard status != .connected else {
@@ -524,7 +524,7 @@ open class SocketIOClient : NSObject, SocketIOClientSpec, SocketEngineClient, So
     /// Adds a handler that will be called on every event.
     ///
     /// - parameter handler: The callback that will execute whenever an event is received.
-    open func onAny(_ handler: @escaping (SocketAnyEvent) -> Void) {
+    open func onAny(_ handler: @escaping (SocketAnyEvent) -> ()) {
         anyHandler = handler
     }
 
diff --git a/Source/SocketTypes.swift b/Source/SocketTypes.swift
index 096c250..bbc1b6d 100644
--- a/Source/SocketTypes.swift
+++ b/Source/SocketTypes.swift
@@ -68,10 +68,10 @@ extension NSNull : SocketData { }
 extension String : SocketData { }
 
 /// A typealias for an ack callback.
-public typealias AckCallback = ([Any]) -> Void
+public typealias AckCallback = ([Any]) -> ()
 
 /// A typealias for a normal callback.
-public typealias NormalCallback = ([Any], SocketAckEmitter) -> Void
+public typealias NormalCallback = ([Any], SocketAckEmitter) -> ()
 
 typealias JSON = [String: Any]
 typealias Probe = (msg: String, type: SocketEnginePacketType, data: [Data])