diff --git a/.travis.yml b/.travis.yml
index efaba0a1..53d24f72 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,17 @@ matrix:
         - bash <(curl -s https://codecov.io/bash)
     - os: osx
       language: objective-c
-      osx_image: xcode9.3
+      osx_image: xcode9.4
+      script:
+        - set -o pipefail
+        - xcodebuild build-for-testing test-without-building -workspace APIKit.xcworkspace -scheme APIKit -configuration Release ENABLE_TESTABILITY=YES | xcpretty -c
+        - xcodebuild build-for-testing test-without-building -workspace APIKit.xcworkspace -scheme APIKit -configuration Release -sdk iphonesimulator -destination "name=iPhone 6s" ENABLE_TESTABILITY=YES | xcpretty -c
+        - xcodebuild build-for-testing test-without-building -workspace APIKit.xcworkspace -scheme APIKit -configuration Release -sdk appletvsimulator -destination "name=Apple TV" ENABLE_TESTABILITY=YES | xcpretty -c
+      after_success:
+        - bash <(curl -s https://codecov.io/bash)
+    - os: osx
+      language: objective-c
+      osx_image: xcode10
       script:
         - set -o pipefail
         - xcodebuild build-for-testing test-without-building -workspace APIKit.xcworkspace -scheme APIKit -configuration Release ENABLE_TESTABILITY=YES | xcpretty -c
@@ -32,7 +42,13 @@ matrix:
         - swift test
     - os: osx
       language: generic
-      osx_image: xcode9.3
+      osx_image: xcode9.4
+      script:
+        - swift build
+        - swift test
+    - os: osx
+      language: generic
+      osx_image: xcode10
       script:
         - swift build
         - swift test
diff --git a/Package@swift-4.2.swift b/Package@swift-4.2.swift
new file mode 100644
index 00000000..9021d1eb
--- /dev/null
+++ b/Package@swift-4.2.swift
@@ -0,0 +1,24 @@
+// swift-tools-version:4.2
+import PackageDescription
+
+let package = Package(
+    name: "APIKit",
+    products: [
+        .library(name: "APIKit", targets: ["APIKit"]),
+    ],
+    dependencies: [
+        .package(url: "https://github.com/antitypical/Result.git", from: "4.0.0"),
+    ],
+    targets: [
+        .target(
+            name: "APIKit", 
+            dependencies: ["Result"],
+            exclude: ["BodyParameters/AbstractInputStream.m"]
+        ),
+         .testTarget(
+            name: "APIKitTests",
+            dependencies: ["APIKit"]
+        ),
+    ],
+    swiftLanguageVersions: [.v4, .v4_2]
+)
diff --git a/Sources/APIKit/BodyParameters/MultipartFormDataBodyParameters.swift b/Sources/APIKit/BodyParameters/MultipartFormDataBodyParameters.swift
index 5282df3e..0b1e2d2d 100644
--- a/Sources/APIKit/BodyParameters/MultipartFormDataBodyParameters.swift
+++ b/Sources/APIKit/BodyParameters/MultipartFormDataBodyParameters.swift
@@ -317,12 +317,18 @@ public extension MultipartFormDataBodyParameters {
             set { }
         }
 
-        override func schedule(in aRunLoop: RunLoop, forMode mode: RunLoopMode) {
+        override func schedule(in aRunLoop: RunLoop, forMode mode: RunLoop.Mode) {
 
         }
 
-        override func remove(from aRunLoop: RunLoop, forMode mode: RunLoopMode) {
+        override func remove(from aRunLoop: RunLoop, forMode mode: RunLoop.Mode) {
 
         }
     }
 }
+
+#if !swift(>=4.2)
+extension RunLoop {
+    internal typealias Mode = RunLoopMode
+}
+#endif