diff --git a/.swift-version b/.swift-version
index 8a36cd1..bf77d54 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-4.1
\ No newline at end of file
+4.2
diff --git a/Alertift.podspec b/Alertift.podspec
index 7035b20..5c28fa4 100644
--- a/Alertift.podspec
+++ b/Alertift.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "Alertift"
-  s.version          = "3.2"
+  s.version          = "4.0"
   s.summary          = "UIAlertControlelr wrapper for Swift."
   s.homepage         = "https://github.com/sgr-ksmt/Alertift"
   # s.screenshots     = ""
diff --git a/Alertift.xcodeproj/project.pbxproj b/Alertift.xcodeproj/project.pbxproj
index 3a2d225..86deb43 100644
--- a/Alertift.xcodeproj/project.pbxproj
+++ b/Alertift.xcodeproj/project.pbxproj
@@ -122,12 +122,12 @@
 		4D13C7641EB064EF007BBB43 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0830;
+				LastUpgradeCheck = 1000;
 				ORGANIZATIONNAME = "Suguru Kishimoto";
 				TargetAttributes = {
 					4D13C76C1EB064EF007BBB43 = {
 						CreatedOnToolsVersion = 8.3.2;
-						LastSwiftMigration = 0830;
+						LastSwiftMigration = 1000;
 						ProvisioningStyle = Automatic;
 					};
 				};
@@ -188,15 +188,23 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -242,15 +250,23 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -295,7 +311,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -314,7 +330,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "-.Alertift";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
diff --git a/Alertift.xcodeproj/xcshareddata/xcschemes/Alertift.xcscheme b/Alertift.xcodeproj/xcshareddata/xcschemes/Alertift.xcscheme
index 6cd1c3d..35bf5f5 100644
--- a/Alertift.xcodeproj/xcshareddata/xcschemes/Alertift.xcscheme
+++ b/Alertift.xcodeproj/xcshareddata/xcschemes/Alertift.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0830"
+   LastUpgradeVersion = "1000"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Alertift.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/Alertift.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/Alertift.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/Demo/Demo.xcodeproj/project.pbxproj b/Demo/Demo.xcodeproj/project.pbxproj
index f71ab58..21abd78 100644
--- a/Demo/Demo.xcodeproj/project.pbxproj
+++ b/Demo/Demo.xcodeproj/project.pbxproj
@@ -111,7 +111,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0830;
-				LastUpgradeCheck = 0830;
+				LastUpgradeCheck = 1000;
 				ORGANIZATIONNAME = "Suguru Kishimoto";
 				TargetAttributes = {
 					4D13C7801EB06535007BBB43 = {
@@ -193,15 +193,23 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -243,15 +251,23 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
diff --git a/Sources/Action.swift b/Sources/Action.swift
index 9ce4eff..f5cf6b0 100644
--- a/Sources/Action.swift
+++ b/Sources/Action.swift
@@ -35,7 +35,7 @@ extension Alertift {
         }
         
         /// **UIAlertAction**'s style
-        private var style: UIAlertActionStyle {
+        private var style: UIAlertAction.Style {
             switch self {
             case .default( _): return .default
             case .destructive( _): return .destructive
diff --git a/Sources/ActionSheet.swift b/Sources/ActionSheet.swift
index c8f37d5..e355921 100644
--- a/Sources/ActionSheet.swift
+++ b/Sources/ActionSheet.swift
@@ -40,7 +40,7 @@ extension Alertift {
         }
 
         /// Add action to alertController
-        public func action(_ action: Alertift.Action, image: UIImage?, renderingMode: UIImageRenderingMode = .automatic, handler: Handler? = nil) -> Self {
+        public func action(_ action: Alertift.Action, image: UIImage?, renderingMode: UIImage.RenderingMode = .automatic, handler: Handler? = nil) -> Self {
             let alertAction = buildAlertAction(action, handler:
                 merge(_alertController.actionHandler, handler ?? { (_, _) in })
             )
diff --git a/Sources/Alert.swift b/Sources/Alert.swift
index e14485f..b664f03 100644
--- a/Sources/Alert.swift
+++ b/Sources/Alert.swift
@@ -68,7 +68,7 @@ extension Alertift {
         ///   - renderMode: Render mode for alert action image. Default is `.automatic`
         ///   - handler: The block to execute after this action performed.
         /// - Returns: Myself
-        public func action(_ action: Alertift.Action, image: UIImage?, renderingMode: UIImageRenderingMode = .automatic, handler: Handler? = nil) -> Self {
+        public func action(_ action: Alertift.Action, image: UIImage?, renderingMode: UIImage.RenderingMode = .automatic, handler: Handler? = nil) -> Self {
             return self.action(action, image: image, renderingMode: renderingMode, isPreferred: false, handler: handler)
         }
 
@@ -81,7 +81,7 @@ extension Alertift {
         ///   - isPreferred: If you want to change this action to preferredAction, set true. Default is false.
         ///   - handler: The block to execute after this action performed.
         /// - Returns: Myself
-        public func action(_ action: Alertift.Action, image: UIImage?, renderingMode: UIImageRenderingMode = .automatic, isPreferred: Bool, handler: Handler? = nil) -> Self {
+        public func action(_ action: Alertift.Action, image: UIImage?, renderingMode: UIImage.RenderingMode = .automatic, isPreferred: Bool, handler: Handler? = nil) -> Self {
             let alertAction = buildAlertAction(
                 action,
                 handler: merge(_alertController.actionWithTextFieldsHandler, handler ?? { (_, _, _)in })
diff --git a/Sources/AlertType.swift b/Sources/AlertType.swift
index 3d81ab0..8914115 100644
--- a/Sources/AlertType.swift
+++ b/Sources/AlertType.swift
@@ -17,7 +17,7 @@ internal protocol _AlertType: class {
 
 extension _AlertType where Self: AlertType {
     /// build AlertController
-    func buildAlertControlelr(title: String? = nil, message: String? = nil, style: UIAlertControllerStyle) {
+    func buildAlertControlelr(title: String? = nil, message: String? = nil, style: UIAlertController.Style) {
         _alertController = InnerAlertController(title: title, message: message, preferredStyle: style)
         _alertController.alertBackgroundColor = type(of: self).backgroundColor
         _alertController.view.tintColor = type(of: self).buttonTextColor
diff --git a/Sources/InnerAlertController.swift b/Sources/InnerAlertController.swift
index 3bc41d9..e682fd9 100644
--- a/Sources/InnerAlertController.swift
+++ b/Sources/InnerAlertController.swift
@@ -159,7 +159,7 @@ class InnerAlertController: UIAlertController {
         NotificationCenter.default.addObserver(
             self,
             selector: #selector(self.textFieldDidChange(_:)),
-            name: .UITextFieldTextDidChange, object: textField
+            name: UITextField.textDidChangeNotification, object: textField
         )
     }