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/Package.swift b/Package.swift
index 47ab400..686b2b7 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,3 +1,4 @@
+// swift-tools-version:5.1
 //
 //  Async.swift
 //
@@ -23,9 +24,21 @@
 //	IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 //	CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-
 import PackageDescription
 
 let package = Package(
-    name: "Async"
-)
\ No newline at end of file
+    name: "Async",
+    platforms: [
+        .macOS(.v10_10),
+        .iOS(.v8),
+        .watchOS(.v3),
+        .tvOS(.v9),
+    ],
+    products: [
+        .library(name: "Async", targets: ["Async"]),
+    ],
+    targets: [
+        .target(name: "Async"),
+        .testTarget(name: "AsyncTests", dependencies: ["Async"])
+    ]
+)