diff --git a/Package@swift-4.swift b/Package@swift-4.swift
new file mode 100644
index 00000000..02d59783
--- /dev/null
+++ b/Package@swift-4.swift
@@ -0,0 +1,15 @@
+// swift-tools-version:4.0
+
+import PackageDescription
+
+let package = Package(
+    name: "PrettyColors",
+    products: [
+        .library(name: "PrettyColors", targets: ["PrettyColors"]),
+    ],
+    dependencies: [],
+    targets: [
+        .target(name: "PrettyColors", path: "Source"),
+        .testTarget(name: "UnitTests", dependencies: ["PrettyColors"]),
+    ]
+)