diff --git a/examples/flutter_view/ios/Runner.xcodeproj/project.pbxproj b/examples/flutter_view/ios/Runner.xcodeproj/project.pbxproj
index 3a95c89319..42d6b8fca4 100644
--- a/examples/flutter_view/ios/Runner.xcodeproj/project.pbxproj
+++ b/examples/flutter_view/ios/Runner.xcodeproj/project.pbxproj
@@ -403,7 +403,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.yourcompany.flutterView;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Profile;
 		};
@@ -531,7 +531,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.yourcompany.flutterView;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -553,7 +553,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.yourcompany.flutterView;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};
diff --git a/examples/platform_channel_swift/ios/Runner.xcodeproj/project.pbxproj b/examples/platform_channel_swift/ios/Runner.xcodeproj/project.pbxproj
index d232ae046e..e3a2df201f 100644
--- a/examples/platform_channel_swift/ios/Runner.xcodeproj/project.pbxproj
+++ b/examples/platform_channel_swift/ios/Runner.xcodeproj/project.pbxproj
@@ -332,7 +332,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Profile;
 		};
@@ -464,7 +464,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -489,7 +489,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};
diff --git a/examples/platform_channel_swift/ios/Runner/AppDelegate.swift b/examples/platform_channel_swift/ios/Runner/AppDelegate.swift
index b8cbd2e456..04ca367664 100644
--- a/examples/platform_channel_swift/ios/Runner/AppDelegate.swift
+++ b/examples/platform_channel_swift/ios/Runner/AppDelegate.swift
@@ -25,7 +25,7 @@ enum MyFlutterErrorCode {
 
   override func application(
     _ application: UIApplication,
-    didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
     GeneratedPluginRegistrant.register(with: self)
     guard let controller = window?.rootViewController as? FlutterViewController else {
       fatalError("rootViewController is not type FlutterViewController")
diff --git a/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner/AppDelegate.swift b/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner/AppDelegate.swift
index 71cc41e34e..70693e4a8c 100644
--- a/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner/AppDelegate.swift
+++ b/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@ import Flutter
 @objc class AppDelegate: FlutterAppDelegate {
   override func application(
     _ application: UIApplication,
-    didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
   ) -> Bool {
     GeneratedPluginRegistrant.register(with: self)
     return super.application(application, didFinishLaunchingWithOptions: launchOptions)
diff --git a/packages/flutter_tools/test/project_test.dart b/packages/flutter_tools/test/project_test.dart
index 6273421879..c52508480a 100644
--- a/packages/flutter_tools/test/project_test.dart
+++ b/packages/flutter_tools/test/project_test.dart
@@ -245,7 +245,7 @@ void main() {
         final FlutterProject project = await someProject();
 
         when(mockXcodeProjectInterpreter.getBuildSettings(any, any)).thenReturn(<String, String>{
-          'SWIFT_VERSION': '3.0',
+          'SWIFT_VERSION': '4.0',
         });
         addAndroidGradleFile(project.directory,
           gradleFileContent: () {