diff --git a/Package.resolved b/Package.resolved
new file mode 100644
index 0000000..5fa8641
--- /dev/null
+++ b/Package.resolved
@@ -0,0 +1,16 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "PromiseKit",
+        "repositoryURL": "https://github.com/mxcl/PromiseKit.git",
+        "state": {
+          "branch": null,
+          "revision": "f14f16cc2602afec1030e4f492100d6d43dca544",
+          "version": "6.13.1"
+        }
+      }
+    ]
+  },
+  "version": 1
+}
diff --git a/Package.swift b/Package.swift
new file mode 100644
index 0000000..f490872
--- /dev/null
+++ b/Package.swift
@@ -0,0 +1,29 @@
+// swift-tools-version:5.0
+
+import PackageDescription
+
+let pkg = Package(name: "PMKUIKit")
+pkg.products = [
+    .library(name: "PMKUIKit", targets: ["PMKUIKit"]),
+]
+pkg.dependencies = [
+    .package(url: "https://github.com/mxcl/PromiseKit.git", from: "6.8.3")
+]
+pkg.swiftLanguageVersions = [.v4, .v4_2, .v5]
+
+let target: Target = .target(name: "PMKUIKit")
+target.path = "Sources"
+target.exclude = ["UIView", "UIViewController"].flatMap {
+    ["\($0)+AnyPromise.m", "\($0)+AnyPromise.h"]
+}
+target.exclude.append("PMKUIKit.h")
+
+target.dependencies = [
+    "PromiseKit"
+]
+
+pkg.targets = [target]
+
+pkg.platforms = [
+   .iOS(.v8)
+]
diff --git a/Sources/UIImagePickerController+Promise.swift b/Sources/UIImagePickerController+Promise.swift
index d112c64..463ff8d 100644
--- a/Sources/UIImagePickerController+Promise.swift
+++ b/Sources/UIImagePickerController+Promise.swift
@@ -5,10 +5,21 @@ import UIKit
 
 #if !os(tvOS)
 
+public struct AnimationOptions: OptionSet {
+    public let rawValue: Int
+
+    public static let appear     = AnimationOptions(rawValue: 1 << 1)
+    public static let disappear  = AnimationOptions(rawValue: 1 << 2)
+
+    public init(rawValue: Int) {
+        self.rawValue = rawValue
+    }
+}
+
 extension UIViewController {
 #if swift(>=4.2)
     /// Presents the UIImagePickerController, resolving with the user action.
-    public func promise(_ vc: UIImagePickerController, animate: PMKAnimationOptions = [.appear, .disappear], completion: (() -> Void)? = nil) -> Promise<[UIImagePickerController.InfoKey: Any]> {
+    public func promise(_ vc: UIImagePickerController, animate: AnimationOptions = [.appear, .disappear], completion: (() -> Void)? = nil) -> Promise<[UIImagePickerController.InfoKey: Any]> {
         let animated = animate.contains(.appear)
         let proxy = UIImagePickerControllerProxy()
         vc.delegate = proxy
@@ -19,7 +30,7 @@ extension UIViewController {
     }
 #else
     /// Presents the UIImagePickerController, resolving with the user action.
-    public func promise(_ vc: UIImagePickerController, animate: PMKAnimationOptions = [.appear, .disappear], completion: (() -> Void)? = nil) -> Promise<[String: Any]> {
+    public func promise(_ vc: UIImagePickerController, animate: AnimationOptions = [.appear, .disappear], completion: (() -> Void)? = nil) -> Promise<[String: Any]> {
         let animated = animate.contains(.appear)
         let proxy = UIImagePickerControllerProxy()
         vc.delegate = proxy