diff --git a/SwiftMonkey.podspec b/SwiftMonkey.podspec
index d403475..0026877 100644
--- a/SwiftMonkey.podspec
+++ b/SwiftMonkey.podspec
@@ -17,5 +17,6 @@ Pod::Spec.new do |s|
   s.source_files = "SwiftMonkey/*.swift"
   s.exclude_files = "SwiftMonkey/Package.swift"
   s.framework    = "XCTest"
+  s.swift_version = "4.2"
   s.pod_target_xcconfig = { 'ENABLE_BITCODE' => 'NO' }
 end
diff --git a/SwiftMonkey/SwiftMonkey.xcodeproj/project.pbxproj b/SwiftMonkey/SwiftMonkey.xcodeproj/project.pbxproj
index e7aba59..933d17e 100644
--- a/SwiftMonkey/SwiftMonkey.xcodeproj/project.pbxproj
+++ b/SwiftMonkey/SwiftMonkey.xcodeproj/project.pbxproj
@@ -125,6 +125,11 @@
 			isa = PBXProject;
 			attributes = {
 				LastUpgradeCheck = 9999;
+				TargetAttributes = {
+					OBJ_17 = {
+						LastSwiftMigration = 1000;
+					};
+				};
 			};
 			buildConfigurationList = OBJ_2 /* Build configuration list for PBXProject "SwiftMonkey" */;
 			compatibilityVersion = "Xcode 3.2";
@@ -176,7 +181,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = SWIFT_PACKAGE;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGET_NAME = SwiftMonkey;
 			};
 			name = Debug;
@@ -198,7 +203,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = SWIFT_PACKAGE;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGET_NAME = SwiftMonkey;
 			};
 			name = Release;
diff --git a/SwiftMonkey/SwiftMonkey.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/SwiftMonkey/SwiftMonkey.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/SwiftMonkey/SwiftMonkey.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/SwiftMonkey/SwiftMonkey.xcodeproj/xcshareddata/xcschemes/SwiftMonkey.xcscheme b/SwiftMonkey/SwiftMonkey.xcodeproj/xcshareddata/xcschemes/SwiftMonkey.xcscheme
index 31ba13d..78d8ad8 100644
--- a/SwiftMonkey/SwiftMonkey.xcodeproj/xcshareddata/xcschemes/SwiftMonkey.xcscheme
+++ b/SwiftMonkey/SwiftMonkey.xcodeproj/xcshareddata/xcschemes/SwiftMonkey.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0920"
+   LastUpgradeVersion = "1000"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -26,7 +26,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
       </Testables>
@@ -37,7 +36,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"
diff --git a/SwiftMonkeyExample/SwiftMonkeyExample.xcodeproj/project.pbxproj b/SwiftMonkeyExample/SwiftMonkeyExample.xcodeproj/project.pbxproj
index 966745d..b07ca4b 100644
--- a/SwiftMonkeyExample/SwiftMonkeyExample.xcodeproj/project.pbxproj
+++ b/SwiftMonkeyExample/SwiftMonkeyExample.xcodeproj/project.pbxproj
@@ -236,7 +236,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0810;
-				LastUpgradeCheck = 0900;
+				LastUpgradeCheck = 1000;
 				ORGANIZATIONNAME = "Zalando SE";
 				TargetAttributes = {
 					C929B5301DD0A764004B256F = {
@@ -391,6 +391,7 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
@@ -398,6 +399,7 @@
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -448,6 +450,7 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
@@ -455,6 +458,7 @@
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
diff --git a/SwiftMonkeyExample/SwiftMonkeyExample.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/SwiftMonkeyExample/SwiftMonkeyExample.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/SwiftMonkeyExample/SwiftMonkeyExample.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/SwiftMonkeyPaws.podspec b/SwiftMonkeyPaws.podspec
index 8631297..dbcb93b 100644
--- a/SwiftMonkeyPaws.podspec
+++ b/SwiftMonkeyPaws.podspec
@@ -15,5 +15,6 @@ Pod::Spec.new do |s|
   s.platform     = :ios, '8.0'
   s.source       = { :git => "https://github.com/zalando/SwiftMonkey.git", :tag => "#{s.version}" }
   s.source_files = "SwiftMonkeyPaws/*.swift"
+  s.swift_version = "4.2"
   s.exclude_files = "SwiftMonkeyPaws/Package.swift"
 end
diff --git a/SwiftMonkeyPaws/MonkeyPaws.swift b/SwiftMonkeyPaws/MonkeyPaws.swift
index 203a7d5..0e4f0b1 100644
--- a/SwiftMonkeyPaws/MonkeyPaws.swift
+++ b/SwiftMonkeyPaws/MonkeyPaws.swift
@@ -210,7 +210,7 @@ private class Gesture {
         numberLayer.string = "1"
         numberLayer.bounds = CGRect(x:0, y: 0, width: 32, height: 13)
         numberLayer.fontSize = 10
-        numberLayer.alignmentMode = kCAAlignmentCenter
+        numberLayer.alignmentMode = CATextLayerAlignmentMode.center
         numberLayer.foregroundColor = colour.cgColor
         numberLayer.position = from
         numberLayer.contentsScale = UIScreen.main.scale
@@ -254,7 +254,7 @@ private class Gesture {
 
             let maskLayer = CAShapeLayer()
             maskLayer.path = maskPath
-            maskLayer.fillRule = kCAFillRuleEvenOdd
+            maskLayer.fillRule = CAShapeLayerFillRule.evenOdd
             maskLayer.position = self.startLayer.position
             newLayer.mask = maskLayer
 
diff --git a/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/project.pbxproj b/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/project.pbxproj
index df432d2..7d34afc 100644
--- a/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/project.pbxproj
+++ b/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/project.pbxproj
@@ -173,7 +173,7 @@
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = SWIFT_PACKAGE;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGET_NAME = SwiftMonkeyPaws;
 			};
 			name = Debug;
@@ -195,7 +195,7 @@
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = SWIFT_PACKAGE;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGET_NAME = SwiftMonkeyPaws;
 			};
 			name = Release;
diff --git a/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/xcshareddata/xcschemes/SwiftMonkeyPaws.xcscheme b/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/xcshareddata/xcschemes/SwiftMonkeyPaws.xcscheme
index ac9433c..7dbfc74 100644
--- a/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/xcshareddata/xcschemes/SwiftMonkeyPaws.xcscheme
+++ b/SwiftMonkeyPaws/SwiftMonkeyPaws.xcodeproj/xcshareddata/xcschemes/SwiftMonkeyPaws.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0920"
+   LastUpgradeVersion = "1000"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -26,7 +26,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
       </Testables>
@@ -37,7 +36,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"