diff --git a/LifetimeTracker.podspec b/LifetimeTracker.podspec
index cda19cc..6a91ff0 100644
--- a/LifetimeTracker.podspec
+++ b/LifetimeTracker.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "LifetimeTracker"
-  s.version      = "1.4.0"
+  s.version      = "1.5.0"
   s.summary      = "Framework to visually warn you when retain cycle / leak happens."
   s.description  = <<-DESC
     Mini framework that can surface retain cycle issues sooner.
@@ -15,5 +15,5 @@ Pod::Spec.new do |s|
   s.resources     = "Sources/**/*.{xib,storyboard}"
   s.resource_bundle = { "LifetimeTracker" => ["Sources/**/*.{strings}"] }
   s.frameworks  = ["Foundation", "UIKit"]
-  s.swift_version = "4.0"
+  s.swift_version = "4.2"
 end
diff --git a/LifetimeTracker.xcodeproj/project.pbxproj b/LifetimeTracker.xcodeproj/project.pbxproj
index c361b79..df5458d 100644
--- a/LifetimeTracker.xcodeproj/project.pbxproj
+++ b/LifetimeTracker.xcodeproj/project.pbxproj
@@ -448,11 +448,11 @@
 				TargetAttributes = {
 					52D6D97B1BEFF229002C0205 = {
 						CreatedOnToolsVersion = 7.1;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 1000;
 					};
 					52D6D9851BEFF229002C0205 = {
 						CreatedOnToolsVersion = 7.1;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 1000;
 					};
 					52D6D9E11BEFFF6E002C0205 = {
 						CreatedOnToolsVersion = 7.1;
@@ -784,6 +784,7 @@
 				PRODUCT_NAME = LifetimeTracker;
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -805,6 +806,7 @@
 				PRODUCT_NAME = LifetimeTracker;
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
@@ -817,6 +819,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "com.LifetimeTracker.LifetimeTracker-iOS-Tests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -829,6 +832,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "com.LifetimeTracker.LifetimeTracker-iOS-Tests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
diff --git a/Sources/UI/CircularDashboard/CircularDashboardViewController.swift b/Sources/UI/CircularDashboard/CircularDashboardViewController.swift
index bd6fd73..d0361e6 100644
--- a/Sources/UI/CircularDashboard/CircularDashboardViewController.swift
+++ b/Sources/UI/CircularDashboard/CircularDashboardViewController.swift
@@ -144,14 +144,14 @@ class CircularDashboardViewController: UIViewController, LifetimeTrackerViewable
 
     private lazy var popoverWindow: UIWindow = {
         let popoverWindow = UIWindow(frame: .zero)
-        popoverWindow.windowLevel = UIWindowLevelNormal
+        popoverWindow.windowLevel = UIWindow.Level.normal
         popoverWindow.frame =  UIScreen.main.bounds
 
         let navigationController = UIStoryboard(name: Constants.Storyboard.circularDashboard.name, bundle: Bundle(for: CircularDashboardViewController.self)).instantiateInitialViewController()
         popoverWindow.rootViewController = navigationController
         popoverWindow.rootViewController?.view.backgroundColor = UIColor.yellow
 
-        self.lifetimeTrackerListViewController = navigationController?.childViewControllers.first as? LifetimeTrackerListViewController
+        self.lifetimeTrackerListViewController = navigationController?.children.first as? LifetimeTrackerListViewController
         self.lifetimeTrackerListViewController?.delegate = self
         self.lifetimeTrackerListViewController?.update(dashboardViewModel: self.dashboardViewModel)
 
diff --git a/Sources/UI/LifetimeTracker+DashboardView.swift b/Sources/UI/LifetimeTracker+DashboardView.swift
index 44279a1..da6f457 100644
--- a/Sources/UI/LifetimeTracker+DashboardView.swift
+++ b/Sources/UI/LifetimeTracker+DashboardView.swift
@@ -9,8 +9,8 @@ import UIKit
 
 fileprivate extension String {
     #if swift(>=4.0)
-    typealias AttributedStringKey = NSAttributedStringKey
-    static let foregroundColorAttributeName = NSAttributedStringKey.foregroundColor
+    typealias AttributedStringKey = NSAttributedString.Key
+    static let foregroundColorAttributeName = NSAttributedString.Key.foregroundColor
     #else
     typealias AttributedStringKey = String
     static let foregroundColorAttributeName = NSForegroundColorAttributeName
@@ -66,7 +66,7 @@ typealias GroupModel = (color: UIColor, title: String, entries: [EntryModel])
 
     private lazy var window: UIWindow = {
         let window = UIWindow(frame: .zero)
-        window.windowLevel = UIWindowLevelStatusBar
+        window.windowLevel = UIWindow.Level.statusBar
         window.frame =  UIScreen.main.bounds
         window.rootViewController = self.lifetimeTrackerView
         return window