diff --git a/Example/Example.xcodeproj/project.pbxproj b/Example/Example.xcodeproj/project.pbxproj
index a6b1d69..368f493 100644
--- a/Example/Example.xcodeproj/project.pbxproj
+++ b/Example/Example.xcodeproj/project.pbxproj
@@ -100,7 +100,6 @@
 				68B695541DFA643F00D3BEA7 /* Frameworks */,
 				68B695551DFA643F00D3BEA7 /* Resources */,
 				5A6F3A57A5B4341A0D73BF0E /* [CP] Embed Pods Frameworks */,
-				4D3CBFE2048DCCC99B4492A9 /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -118,20 +117,20 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0810;
-				LastUpgradeCheck = 0910;
+				LastUpgradeCheck = 1120;
 				ORGANIZATIONNAME = ebt;
 				TargetAttributes = {
 					68B695561DFA643F00D3BEA7 = {
 						CreatedOnToolsVersion = 8.1;
 						DevelopmentTeam = AY957U87NM;
-						LastSwiftMigration = 0910;
+						LastSwiftMigration = 1120;
 						ProvisioningStyle = Automatic;
 					};
 				};
 			};
 			buildConfigurationList = 68B695521DFA643F00D3BEA7 /* Build configuration list for PBXProject "Example" */;
 			compatibilityVersion = "Xcode 3.2";
-			developmentRegion = English;
+			developmentRegion = en;
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,
@@ -161,41 +160,28 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		4D3CBFE2048DCCC99B4492A9 /* [CP] Copy Pods Resources */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputPaths = (
-			);
-			name = "[CP] Copy Pods Resources";
-			outputPaths = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-Example/Pods-Example-resources.sh\"\n";
-			showEnvVarsInLog = 0;
-		};
 		5A6F3A57A5B4341A0D73BF0E /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
-				"${SRCROOT}/Pods/Target Support Files/Pods-Example/Pods-Example-frameworks.sh",
+				"${PODS_ROOT}/Target Support Files/Pods-Example/Pods-Example-frameworks.sh",
 				"${BUILT_PRODUCTS_DIR}/RxCocoa/RxCocoa.framework",
+				"${BUILT_PRODUCTS_DIR}/RxRelay/RxRelay.framework",
 				"${BUILT_PRODUCTS_DIR}/RxSwift/RxSwift.framework",
 				"${BUILT_PRODUCTS_DIR}/RxUIAlertController/RxUIAlertController.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RxCocoa.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RxRelay.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RxSwift.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RxUIAlertController.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-Example/Pods-Example-frameworks.sh\"\n";
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Example/Pods-Example-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
 		AE49EF36DBB328161162ECEE /* [CP] Check Pods Manifest.lock */ = {
@@ -254,6 +240,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -263,6 +250,7 @@
 				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;
@@ -270,6 +258,7 @@
 				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;
@@ -310,6 +299,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -319,6 +309,7 @@
 				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;
@@ -326,6 +317,7 @@
 				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;
@@ -367,7 +359,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.morenotepad.Example;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -384,7 +376,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.morenotepad.Example;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
diff --git a/Example/Example/AppDelegate.swift b/Example/Example/AppDelegate.swift
index e91e3a8..a7ab327 100644
--- a/Example/Example/AppDelegate.swift
+++ b/Example/Example/AppDelegate.swift
@@ -14,7 +14,7 @@ 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]?) -> Bool {
         // Override point for customization after application launch.
         return true
     }
diff --git a/Example/Podfile.lock b/Example/Podfile.lock
index f8adfd5..7f14fe3 100644
--- a/Example/Podfile.lock
+++ b/Example/Podfile.lock
@@ -1,23 +1,33 @@
 PODS:
-  - RxCocoa (4.0.0):
-    - RxSwift (~> 4.0)
-  - RxSwift (4.0.0)
-  - RxUIAlertController (1.1.0):
+  - RxCocoa (5.0.1):
+    - RxRelay (~> 5)
+    - RxSwift (~> 5)
+  - RxRelay (5.0.1):
+    - RxSwift (~> 5)
+  - RxSwift (5.0.1)
+  - RxUIAlertController (1.2):
     - RxCocoa
     - RxSwift
 
 DEPENDENCIES:
   - RxUIAlertController (from `../`)
 
+SPEC REPOS:
+  trunk:
+    - RxCocoa
+    - RxRelay
+    - RxSwift
+
 EXTERNAL SOURCES:
   RxUIAlertController:
-    :path: ../
+    :path: "../"
 
 SPEC CHECKSUMS:
-  RxCocoa: d62846ca96495d862fa4c59ea7d87e5031d7340e
-  RxSwift: fd680d75283beb5e2559486f3c0ff852f0d35334
-  RxUIAlertController: d8f3c7683902ace299d22f59f0c60e77e8478a62
+  RxCocoa: e741b9749968e8a143e2b787f1dfbff2b63d0a5c
+  RxRelay: 89d54507f4fd4d969e6ec1d4bd7f3673640b4640
+  RxSwift: e2dc62b366a3adf6a0be44ba9f405efd4c94e0c4
+  RxUIAlertController: 52096a2e7ec1a70658fe87b052db268e5820429c
 
 PODFILE CHECKSUM: e001db0045e2931dc0163727851e37d20de11750
 
-COCOAPODS: 1.3.1
+COCOAPODS: 1.8.4
diff --git a/RxUIAlertController.podspec b/RxUIAlertController.podspec
index 0e93f48..c056fe6 100644
--- a/RxUIAlertController.podspec
+++ b/RxUIAlertController.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "RxUIAlertController"
-  s.version          = "1.1.1"
+  s.version          = "1.2"
   s.summary          = "ReactiveX way to use UIAlertController on iOS."
   s.description      = <<-EOS
   RxSwift binding for [Permission](https://github.com/delba/Permission) API that helps you with UIAlertController in iOS.
@@ -9,8 +9,8 @@ Pod::Spec.new do |s|
   s.license          = 'MIT'
   s.author           = { "roshanman" => "morenotepad@163.com" }
   s.source           = { :git => "https://github.com/roshanman/RxUIAlertController.git", :tag => s.version.to_s }
-  s.platform     = :ios, '8.0'
-  s.ios.deployment_target = '8.0'
+  s.platform     = :ios, '10.0'
+  s.ios.deployment_target = '10.0'
   s.source_files = 'Source/*.swift'
   s.dependency 'RxSwift'
   s.dependency 'RxCocoa'
diff --git a/Source/RxAlertController.swift b/Source/RxAlertController.swift
index 805a258..a9bcb6a 100644
--- a/Source/RxAlertController.swift
+++ b/Source/RxAlertController.swift
@@ -10,17 +10,14 @@ import UIKit
 import RxSwift
 import RxCocoa
 
-@available(iOS 8.0, *)
 public func Alert(title: String?, message: String?) -> AlertController  {
     return AlertController(title: title, message: message, preferredStyle: .alert)
 }
 
-@available(iOS 8.0, *)
 public func ActionSheet(title: String?, message: String?) -> AlertController {
     return AlertController(title: title, message: message, preferredStyle: .actionSheet)
 }
 
-@available(iOS 8.0, *)
 public class AlertController: NSObject {
 
     public struct Result {
@@ -40,7 +37,7 @@ public class AlertController: NSObject {
     private  var retainSelf: Any?
     private  let disposeBag = DisposeBag()
 
-    init(title: String?, message: String?, preferredStyle: UIAlertControllerStyle) {
+    init(title: String?, message: String?, preferredStyle: UIAlertController.Style) {
         alertController = .init(title:title, message:message, preferredStyle:preferredStyle)
 
         super.init()
@@ -56,12 +53,12 @@ public class AlertController: NSObject {
         retainSelf = self
     }
 
-    public func addAction(title: String, style: UIAlertActionStyle = .default,
+    public func addAction(title: String, style: UIAlertAction.Style = .default,
                           configure: ((UIAlertController, UIAlertAction) -> Void)? = nil) -> Self {
         let action = UIAlertAction(title: title, style: style) { [unowned self] action in
 
             let result = Result(alert: self.alertController, buttonTitle: title,
-                                buttonIndex: self.alertController.actions.index(of: action) ?? 0)
+                                buttonIndex: self.alertController.actions.firstIndex(of: action) ?? 0)
 
             self.observer?.onNext(result)
             self.observer?.onCompleted()
@@ -73,7 +70,7 @@ public class AlertController: NSObject {
     }
 
     @available(iOS 9.0, *)
-    public func addPreferredAction(title: String, style: UIAlertActionStyle = .default,
+    public func addPreferredAction(title: String, style: UIAlertAction.Style = .default,
                                    configure: ((UIAlertController, UIAlertAction) -> Void)? = nil) -> Self {
         return addAction(title: title, style: style) { alertController, action in
           alertController.preferredAction = action
@@ -134,8 +131,8 @@ public class AlertController: NSObject {
     private var topViewController:UIViewController? {
         var topController = self.presentedController
 
-        while topController?.childViewControllers.last != nil {
-            topController = topController?.childViewControllers.last!
+        while topController?.children.last != nil {
+            topController = topController?.children.last!
         }
 
         return topController
@@ -176,7 +173,7 @@ public class AlertController: NSObject {
 }
 
 public extension Reactive where Base: AlertController {
-    public func show(animated: Bool = true, completion: (() -> Void)? = nil) -> Observable<AlertController.Result>  {
+    func show(animated: Bool = true, completion: (() -> Void)? = nil) -> Observable<AlertController.Result>  {
         self.base.show(animated: animated, completion: completion)
 
         return Observable.create { observer in