diff --git a/Cartfile.resolved b/Cartfile.resolved
index f783977..a1b7674 100644
--- a/Cartfile.resolved
+++ b/Cartfile.resolved
@@ -1 +1 @@
-github "kishikawakatsumi/KeychainAccess" "v3.2.0"
+github "kishikawakatsumi/KeychainAccess" "v4.2.1"
diff --git a/Package.swift b/Package.swift
new file mode 100644
index 0000000..19cb101
--- /dev/null
+++ b/Package.swift
@@ -0,0 +1,30 @@
+// swift-tools-version:5.0
+import PackageDescription
+
+let package = Package(
+    name: "Holocron",
+    platforms: [
+        .macOS("10.12"),
+        .iOS("10.0"),
+        .tvOS("10.0"),
+        .watchOS("4.2")
+    ],
+    products: [
+        .library(
+            name: "Holocron",
+            targets: ["Holocron-iOS"])
+    ],
+    dependencies: [
+        .package(url: "https://github.com/kishikawakatsumi/KeychainAccess.git", from: "4.2.1")
+    ],
+    targets: [
+        .target(
+            name: "Holocron-iOS",
+            dependencies: ["KeychainAccess"],
+            path: "Sources"),
+        .testTarget(
+            name: "Holocron-iOSTests",
+            dependencies: ["Holocron-iOS"],
+            path: "Tests")
+    ]
+)