diff --git a/Package@Swift-4.0.swift b/Package@Swift-4.0.swift
new file mode 100644
index 0000000..4bf774c
--- /dev/null
+++ b/Package@Swift-4.0.swift
@@ -0,0 +1,65 @@
+// swift-tools-version:4.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+//
+//  Package.swift
+//  CryptorRSA
+//
+//  Copyright © 2017 IBM. All rights reserved.
+//
+// 	Licensed under the Apache License, Version 2.0 (the "License");
+// 	you may not use this file except in compliance with the License.
+// 	You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// 	Unless required by applicable law or agreed to in writing, software
+// 	distributed under the License is distributed on an "AS IS" BASIS,
+// 	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// 	See the License for the specific language governing permissions and
+// 	limitations under the License.
+//
+
+import PackageDescription
+
+#if os(macOS) || os(iOS) || os(tvOS) || os(watchOS)
+	
+    let CryptoLibUrl = "https://github.com/IBM-Swift/CommonCrypto.git"
+    let CryptoLibVersion: Package.Dependency.Requirement = .upToNextMajor(from: "1.0.0")
+	
+#elseif os(Linux)
+	
+	let CryptoLibUrl = "https://github.com/IBM-Swift/OpenSSL.git"
+    let CryptoLibVersion: Package.Dependency.Requirement = .upToNextMajor(from: "1.0.1")
+	
+#else
+	
+	fatalError("Unsupported OS")
+	
+#endif
+
+let package = Package(
+	name: "CryptorRSA",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "CryptorRSA",
+            targets: ["CryptorRSA"]
+        )
+    ],
+	dependencies: [
+        .package(url: CryptoLibUrl, CryptoLibVersion)
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "CryptorRSA",
+            dependencies: []
+        ),
+        .testTarget(
+            name: "CryptorRSATests",
+            dependencies: ["CryptorRSA"]
+        )
+    ]
+)
diff --git a/Package@Swift-4.1.swift b/Package@Swift-4.1.swift
new file mode 100644
index 0000000..4bf774c
--- /dev/null
+++ b/Package@Swift-4.1.swift
@@ -0,0 +1,65 @@
+// swift-tools-version:4.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+//
+//  Package.swift
+//  CryptorRSA
+//
+//  Copyright © 2017 IBM. All rights reserved.
+//
+// 	Licensed under the Apache License, Version 2.0 (the "License");
+// 	you may not use this file except in compliance with the License.
+// 	You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// 	Unless required by applicable law or agreed to in writing, software
+// 	distributed under the License is distributed on an "AS IS" BASIS,
+// 	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// 	See the License for the specific language governing permissions and
+// 	limitations under the License.
+//
+
+import PackageDescription
+
+#if os(macOS) || os(iOS) || os(tvOS) || os(watchOS)
+	
+    let CryptoLibUrl = "https://github.com/IBM-Swift/CommonCrypto.git"
+    let CryptoLibVersion: Package.Dependency.Requirement = .upToNextMajor(from: "1.0.0")
+	
+#elseif os(Linux)
+	
+	let CryptoLibUrl = "https://github.com/IBM-Swift/OpenSSL.git"
+    let CryptoLibVersion: Package.Dependency.Requirement = .upToNextMajor(from: "1.0.1")
+	
+#else
+	
+	fatalError("Unsupported OS")
+	
+#endif
+
+let package = Package(
+	name: "CryptorRSA",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "CryptorRSA",
+            targets: ["CryptorRSA"]
+        )
+    ],
+	dependencies: [
+        .package(url: CryptoLibUrl, CryptoLibVersion)
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "CryptorRSA",
+            dependencies: []
+        ),
+        .testTarget(
+            name: "CryptorRSATests",
+            dependencies: ["CryptorRSA"]
+        )
+    ]
+)
diff --git a/Package@Swift-4.swift b/Package@Swift-4.swift
new file mode 100644
index 0000000..20411c4
--- /dev/null
+++ b/Package@Swift-4.swift
@@ -0,0 +1,58 @@
+// swift-tools-version:4.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+//
+//  Package.swift
+//  CryptorRSA
+//
+//  Copyright © 2017 IBM. All rights reserved.
+//
+// 	Licensed under the Apache License, Version 2.0 (the "License");
+// 	you may not use this file except in compliance with the License.
+// 	You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// 	Unless required by applicable law or agreed to in writing, software
+// 	distributed under the License is distributed on an "AS IS" BASIS,
+// 	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// 	See the License for the specific language governing permissions and
+// 	limitations under the License.
+//
+
+import PackageDescription
+
+var dependencies: [Package.Dependency] = []
+var targetDependencies: [Target.Dependency] = []
+
+	
+#if os(Linux)
+	
+dependencies.append(Package.Dependency.package(url: "https://github.com/IBM-Swift/OpenSSL.git", .upToNextMajor(from: "1.0.1")))
+    targetDependencies.append(Target.Dependency.byName(name: "OpenSSL"))
+	
+#endif
+
+let package = Package(
+	name: "CryptorRSA",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "CryptorRSA",
+            targets: ["CryptorRSA"]
+        )
+    ],
+	dependencies: dependencies,
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "CryptorRSA",
+            dependencies: targetDependencies
+        ),
+        .testTarget(
+            name: "CryptorRSATests",
+            dependencies: ["CryptorRSA"]
+        )
+    ]
+)