diff --git a/.swift-version b/.swift-version
index f2c6cb6..819e07a 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-4.2.3
+5.0
diff --git a/.travis.yml b/.travis.yml
index 1fd5fb0..b54d50d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,17 +25,17 @@ matrix:
       dist: xenial
       sudo: required
       services: docker
-      env: DOCKER_IMAGE=swift:4.2.3
+      env: DOCKER_IMAGE=swift:4.2.4 SWIFT_SNAPSHOT=4.2.4
     - os: linux
       dist: xenial
       sudo: required
       services: docker
-      env: DOCKER_IMAGE=swift:4.2.3 SWIFT_SNAPSHOT=$SWIFT_DEVELOPMENT_SNAPSHOT
+      env: DOCKER_IMAGE=swift:5.0-xenial
     - os: linux
       dist: xenial
       sudo: required
       services: docker
-      env: DOCKER_IMAGE=ubuntu:18.04
+      env: DOCKER_IMAGE=swift:5.0 SWIFT_SNAPSHOT=$SWIFT_DEVELOPMENT_SNAPSHOT
     - os: osx
       osx_image: xcode9.2
       sudo: required
@@ -47,8 +47,12 @@ matrix:
     - os: osx
       osx_image: xcode10.1
       sudo: required
+      env: SWIFT_SNAPSHOT=4.2.1
     - os: osx
-      osx_image: xcode10.1
+      osx_image: xcode10.2
+      sudo: required
+    - os: osx
+      osx_image: xcode10.2
       sudo: required
       env: SWIFT_SNAPSHOT=$SWIFT_DEVELOPMENT_SNAPSHOT
 
diff --git a/Package.swift b/Package.swift
index 1aebf27..6c1205e 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,7 +1,7 @@
-// swift-tools-version:4.0
+// swift-tools-version:5.0
 
 /**
- * Copyright IBM Corporation 2018
+ * Copyright IBM Corporation 2018-2019
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/Package@swift-4.swift b/Package@swift-4.swift
new file mode 100644
index 0000000..a6684d5
--- /dev/null
+++ b/Package@swift-4.swift
@@ -0,0 +1,41 @@
+// swift-tools-version:4.0
+
+/**
+ * Copyright IBM Corporation 2018-2019
+ *
+ * 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
+
+let package = Package(
+    name: "SwiftJWT",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "SwiftJWT",
+            targets: ["SwiftJWT"]
+        )
+    ],
+    dependencies: [
+        .package(url: "https://github.com/IBM-Swift/BlueRSA.git", from: "1.0.24"),
+        .package(url: "https://github.com/IBM-Swift/BlueCryptor.git", from: "1.0.0"),
+        .package(url: "https://github.com/IBM-Swift/BlueECC.git", from: "1.1.0"),
+        .package(url: "https://github.com/IBM-Swift/LoggerAPI.git", from: "1.7.0"),
+        .package(url: "https://github.com/IBM-Swift/KituraContracts.git", from: "1.1.0")
+    ],
+    targets: [
+        .target(name: "SwiftJWT", dependencies: ["CryptorRSA", "LoggerAPI", "KituraContracts", "Cryptor", "CryptorECC"]),
+        .testTarget(name: "SwiftJWTTests", dependencies: ["SwiftJWT"])
+	]
+)
diff --git a/Sources/SwiftJWT/BlueHMAC.swift b/Sources/SwiftJWT/BlueHMAC.swift
index 4aea43c..adefd41 100644
--- a/Sources/SwiftJWT/BlueHMAC.swift
+++ b/Sources/SwiftJWT/BlueHMAC.swift
@@ -47,7 +47,11 @@ class BlueHMAC: SignerAlgorithm, VerifierAlgorithm {
         guard let hmac = HMAC(using: algorithm, key: key).update(data: data)?.final() else {
             throw JWTError.invalidPrivateKey
         }
+        #if swift(>=5.0)
+        return Data(hmac)
+        #else 
         return Data(bytes: hmac)
+        #endif
     }