diff --git a/.gitignore b/.gitignore
index 0c27a7c..cc746c5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,8 +34,8 @@ playground.xcworkspace
 
 # Swift Package Manager
 #
-# Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
-# Packages/
+# Avoid checking in source code from Swift Package Manager dependencies.
+Packages/
 .build/
 
 # CocoaPods
diff --git a/Package.swift b/Package.swift
new file mode 100644
index 0000000..52bd987
--- /dev/null
+++ b/Package.swift
@@ -0,0 +1,9 @@
+import PackageDescription
+
+let package = Package(
+    name: "ReactiveAlamofire",
+    dependencies: [
+        .Package(url: "https://github.com/ReactiveKit/ReactiveKit.git", majorVersion: 3),
+        .Package(url: "https://github.com/Alamofire/Alamofire.git", majorVersion: 4, minor: 2)
+    ]
+)
diff --git a/Sources/Request.swift b/Sources/Request.swift
index 1d04a83..15523e6 100644
--- a/Sources/Request.swift
+++ b/Sources/Request.swift
@@ -22,6 +22,10 @@
 //  THE SOFTWARE.
 //
 
+#if os(OSX)
+import Cocoa
+#endif
+
 import Alamofire
 import ReactiveKit