diff --git a/Package.swift b/Package.swift
index abda948..01cf4c6 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,10 +1,22 @@
-// swift-tools-version:3.1
+// swift-tools-version:4.0
 import PackageDescription
 
 let package = Package(
   name: "Stencil",
+  products: [
+    .library(name: "Stencil", targets: ["Stencil"]),
+  ],
   dependencies: [
-    .Package(url: "https://github.com/kylef/PathKit.git", majorVersion: 0, minor: 9),
-    .Package(url: "https://github.com/kylef/Spectre.git", majorVersion: 0, minor: 8),
+    .package(url: "https://github.com/kylef/PathKit.git", from: "0.9.0"),
+    .package(url: "https://github.com/kylef/Spectre.git", from: "0.8.0"),
+  ],
+  targets: [
+    .target(name: "Stencil", dependencies: [
+      "PathKit",
+    ], path: "Sources"),
+    .testTarget(name: "StencilTests", dependencies: [
+      "Stencil",
+      "Spectre",
+    ])
   ]
 )