diff --git a/Package.swift b/Package.swift
index 5e5e1bf..02a2911 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:4.0
+// swift-tools-version:5.0
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 //
 //  Package.swift
diff --git a/Package@swift-4.2.swift b/Package@swift-4.2.swift
new file mode 100644
index 0000000..921b7f6
--- /dev/null
+++ b/Package@swift-4.2.swift
@@ -0,0 +1,41 @@
+// swift-tools-version:4.2
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+//
+//  Package.swift
+//  Perfect-INIParser
+//
+//  Created by Rockford Wei on 2017-04-25.
+//  Copyright © 2017 PerfectlySoft. All rights reserved.
+//
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Perfect.org open source project
+//
+// Copyright (c) 2017 - 2018 PerfectlySoft Inc. and the Perfect project authors
+// Licensed under Apache License v2.0
+//
+// See http://perfect.org/licensing.html for license information
+//
+//===----------------------------------------------------------------------===//
+//
+
+import PackageDescription
+
+let package = Package(
+    name: "INIParser",
+    products: [
+        .library(
+            name: "INIParser",
+            targets: ["INIParser"]),
+    ],
+    dependencies: [
+    ],
+    targets: [
+        .target(
+            name: "INIParser",
+            dependencies: []),
+        .testTarget(
+            name: "INIParserTests",
+            dependencies: ["INIParser"]),
+    ]
+)
diff --git a/Package@swift-4.swift b/Package@swift-4.swift
new file mode 100644
index 0000000..b0a5658
--- /dev/null
+++ b/Package@swift-4.swift
@@ -0,0 +1,41 @@
+// swift-tools-version:4.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+//
+//  Package.swift
+//  Perfect-INIParser
+//
+//  Created by Rockford Wei on 2017-04-25.
+//  Copyright © 2017 PerfectlySoft. All rights reserved.
+//
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Perfect.org open source project
+//
+// Copyright (c) 2017 - 2018 PerfectlySoft Inc. and the Perfect project authors
+// Licensed under Apache License v2.0
+//
+// See http://perfect.org/licensing.html for license information
+//
+//===----------------------------------------------------------------------===//
+//
+
+import PackageDescription
+d
+let package = Package(
+    name: "INIParser",
+    products: [
+        .library(
+            name: "INIParser",
+            targets: ["INIParser"]),
+    ],
+    dependencies: [
+    ],
+    targets: [
+        .target(
+            name: "INIParser",
+            dependencies: []),
+        .testTarget(
+            name: "INIParserTests",
+            dependencies: ["INIParser"]),
+    ]
+)