diff --git a/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..919434a
--- /dev/null
+++ b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
diff --git a/GradientLoadingBar/Classes/Misc/Constants.swift b/GradientLoadingBar/Classes/Misc/Constants.swift
index d9d34b6..e7dcf2b 100644
--- a/GradientLoadingBar/Classes/Misc/Constants.swift
+++ b/GradientLoadingBar/Classes/Misc/Constants.swift
@@ -6,7 +6,7 @@
 //  Copyright © 2019 Felix Mau. All rights reserved.
 //
 
-import Foundation
+import UIKit
 
 extension UIColor {
     /// Default colors for components.
diff --git a/GradientLoadingBar/Classes/ViewModel/GradientActivityIndicatorViewModel.swift b/GradientLoadingBar/Classes/ViewModel/GradientActivityIndicatorViewModel.swift
index 8ec2e84..c14a0f0 100644
--- a/GradientLoadingBar/Classes/ViewModel/GradientActivityIndicatorViewModel.swift
+++ b/GradientLoadingBar/Classes/ViewModel/GradientActivityIndicatorViewModel.swift
@@ -6,7 +6,7 @@
 //  Copyright © 2019 Felix Mau. All rights reserved.
 //
 
-import Foundation
+import UIKit
 import LightweightObservable
 
 // MARK: - Types
diff --git a/GradientLoadingBar/Classes/ViewModel/GradientLoadingBarViewModel.swift b/GradientLoadingBar/Classes/ViewModel/GradientLoadingBarViewModel.swift
index c1e5454..d720e90 100644
--- a/GradientLoadingBar/Classes/ViewModel/GradientLoadingBarViewModel.swift
+++ b/GradientLoadingBar/Classes/ViewModel/GradientLoadingBarViewModel.swift
@@ -6,7 +6,7 @@
 //  Copyright © 2017 Felix Mau. All rights reserved.
 //
 
-import Foundation
+import UIKit
 import LightweightObservable
 
 /// This view model checks for the availability of the key-window,
diff --git a/Package.resolved b/Package.resolved
new file mode 100644
index 0000000..4ce421e
--- /dev/null
+++ b/Package.resolved
@@ -0,0 +1,16 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "LightweightObservable",
+        "repositoryURL": "https://github.com/fxm90/LightweightObservable",
+        "state": {
+          "branch": null,
+          "revision": "b689038f3dcb2564d2bc6c4f710765776d5b9356",
+          "version": "2.0.0"
+        }
+      }
+    ]
+  },
+  "version": 1
+}
diff --git a/Package.swift b/Package.swift
new file mode 100644
index 0000000..4670b0e
--- /dev/null
+++ b/Package.swift
@@ -0,0 +1,27 @@
+// swift-tools-version:5.0
+
+import PackageDescription
+
+let package = Package(
+    name: "GradientLoadingBar",
+    platforms: [.iOS(.v9)],
+    products: [
+        .library(
+            name: "GradientLoadingBar",
+            targets: ["GradientLoadingBar"]
+        )
+    ],
+    dependencies: [
+        .package(
+            url: "https://github.com/fxm90/LightweightObservable",
+            .upToNextMajor(from: "2.0.0")
+        )
+    ],
+    targets: [
+        .target(
+            name: "GradientLoadingBar",
+            dependencies: ["LightweightObservable"],
+            path: "GradientLoadingBar/Classes"
+        )
+    ]
+)