diff --git a/Package.swift b/Package.swift
index 4fce49f..ef00f26 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,9 +1,10 @@
+// swift-tools-version:4.0
+
 import PackageDescription
 
 let package = Package(
     name: "CodableAlamofire",
     dependencies : [
-   		.Package(url: "https://github.com/Alamofire/Alamofire", majorVersion: 4)
-    ],
-    exclude: ["Tests"]
+   		.package(url: "https://github.com/Alamofire/Alamofire", .branch("swift4"))
+    ]
 )
\ No newline at end of file