diff --git a/.gitignore b/.gitignore
index fa42cbd..e28632a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,6 +41,7 @@ playground.xcworkspace
 # Package.pins
 # Package.resolved
 .build/
+.swiftpm/
 
 # CocoaPods
 #
diff --git a/Package.resolved b/Package.resolved
new file mode 100644
index 0000000..e3afef8
--- /dev/null
+++ b/Package.resolved
@@ -0,0 +1,16 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "RxSwift",
+        "repositoryURL": "https://github.com/ReactiveX/RxSwift.git",
+        "state": {
+          "branch": null,
+          "revision": "b3e888b4972d9bc76495dd74d30a8c7fad4b9395",
+          "version": "5.0.1"
+        }
+      }
+    ]
+  },
+  "version": 1
+}
diff --git a/Package.swift b/Package.swift
new file mode 100644
index 0000000..e2d83f6
--- /dev/null
+++ b/Package.swift
@@ -0,0 +1,24 @@
+// swift-tools-version:5.1
+
+import PackageDescription
+
+let package = Package(
+    name: "Unio",
+    platforms: [.iOS(.v9)],
+    products: [
+        .library(name: "Unio",
+                 targets: ["Unio"]),
+    ],
+    dependencies: [
+        .package(url: "https://github.com/ReactiveX/RxSwift.git", from: "5.0.0")
+    ],
+    targets: [
+        .target(name: "Unio",
+                dependencies: ["RxSwift", "RxRelay"],
+                path: "Unio"),
+        .testTarget(name: "UnioTests",
+                    dependencies: ["Unio", "RxCocoa"],
+                    path: "UnioTests"),
+    ],
+    swiftLanguageVersions: [.v5]
+)