diff --git a/Example/LoadingPlaceholderView.xcodeproj/project.pbxproj b/Example/LoadingPlaceholderView.xcodeproj/project.pbxproj
index 367c530..f9bb4c3 100644
--- a/Example/LoadingPlaceholderView.xcodeproj/project.pbxproj
+++ b/Example/LoadingPlaceholderView.xcodeproj/project.pbxproj
@@ -481,7 +481,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -498,7 +498,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.marioiannotta.loadingplaceholderview;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
diff --git a/Example/LoadingPlaceholderView/AppDelegate.swift b/Example/LoadingPlaceholderView/AppDelegate.swift
index 0f72748..164c1ac 100644
--- a/Example/LoadingPlaceholderView/AppDelegate.swift
+++ b/Example/LoadingPlaceholderView/AppDelegate.swift
@@ -13,8 +13,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
     var window: UIWindow?
 
-
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
         // Override point for customization after application launch.
         return true
     }