diff --git a/PasscodeLock/PasscodeLockViewController.swift b/PasscodeLock/PasscodeLockViewController.swift
index 095f10f2..6b9fd481 100644
--- a/PasscodeLock/PasscodeLockViewController.swift
+++ b/PasscodeLock/PasscodeLockViewController.swift
@@ -110,8 +110,8 @@ public class PasscodeLockViewController: UIViewController, PasscodeLockTypeDeleg
     
     private func setupEvents() {
         
-        notificationCenter?.addObserver(self, selector: "appWillEnterForegroundHandler:", name: UIApplicationWillEnterForegroundNotification, object: nil)
-        notificationCenter?.addObserver(self, selector: "appDidEnterBackgroundHandler:", name: UIApplicationDidEnterBackgroundNotification, object: nil)
+        notificationCenter?.addObserver(self, selector: #selector(PasscodeLockViewController.appWillEnterForegroundHandler(_:)), name: UIApplicationWillEnterForegroundNotification, object: nil)
+        notificationCenter?.addObserver(self, selector: #selector(PasscodeLockViewController.appDidEnterBackgroundHandler(_:)), name: UIApplicationDidEnterBackgroundNotification, object: nil)
     }
     
     private func clearEvents() {
@@ -154,7 +154,7 @@ public class PasscodeLockViewController: UIViewController, PasscodeLockTypeDeleg
         passcodeLock.authenticateWithBiometrics()
     }
     
-    private func authenticateWithBiometrics() {
+    public func authenticateWithBiometrics() {
         
         if passcodeConfiguration.shouldRequestTouchIDImmediately && passcodeLock.isTouchIDAllowed {
             
diff --git a/PasscodeLock/Views/PasscodeSignButton.swift b/PasscodeLock/Views/PasscodeSignButton.swift
index 9fb3968a..dfd9fe0c 100644
--- a/PasscodeLock/Views/PasscodeSignButton.swift
+++ b/PasscodeLock/Views/PasscodeSignButton.swift
@@ -55,7 +55,7 @@ public class PasscodeSignButton: UIButton {
         return CGSizeMake(60, 60)
     }
     
-    private var defaultBackgroundColor = UIColor.clearColor()
+    public var defaultBackgroundColor = UIColor.clearColor()
     
     private func setupView() {
         
@@ -71,8 +71,8 @@ public class PasscodeSignButton: UIButton {
     
     private func setupActions() {
         
-        addTarget(self, action: Selector("handleTouchDown"), forControlEvents: .TouchDown)
-        addTarget(self, action: Selector("handleTouchUp"), forControlEvents: [.TouchUpInside, .TouchDragOutside, .TouchCancel])
+        addTarget(self, action: #selector(PasscodeSignButton.handleTouchDown), forControlEvents: .TouchDown)
+        addTarget(self, action: #selector(PasscodeSignButton.handleTouchUp), forControlEvents: [.TouchUpInside, .TouchDragOutside, .TouchCancel])
     }
     
     func handleTouchDown() {