diff --git a/GradientSlider.xcodeproj/project.pbxproj b/GradientSlider.xcodeproj/project.pbxproj
index 3b18e2e..c6548a4 100644
--- a/GradientSlider.xcodeproj/project.pbxproj
+++ b/GradientSlider.xcodeproj/project.pbxproj
@@ -93,12 +93,13 @@
 		FC1C41711B730A410083C062 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0900;
+				LastUpgradeCheck = 1010;
 				ORGANIZATIONNAME = "Jonathan Hull";
 				TargetAttributes = {
 					FC1C41781B730A410083C062 = {
 						CreatedOnToolsVersion = 7.0;
 						DevelopmentTeam = 87YJPWK77H;
+						LastSwiftMigration = 1010;
 					};
 				};
 			};
@@ -178,12 +179,14 @@
 				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_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				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;
@@ -230,12 +233,14 @@
 				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_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				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;
@@ -273,7 +278,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.jonhull.GradientSlider;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -286,7 +291,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.jonhull.GradientSlider;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
diff --git a/GradientSlider.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/GradientSlider.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/GradientSlider.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/GradientSlider/GradientSlider.swift b/GradientSlider/GradientSlider.swift
index 8d3b80b..9574fbd 100644
--- a/GradientSlider/GradientSlider.swift
+++ b/GradientSlider/GradientSlider.swift
@@ -228,12 +228,12 @@ import UIKit
     
     //MARK: - Layout
     override var intrinsicContentSize:CGSize {
-        return CGSize(width: UIViewNoIntrinsicMetric, height: thumbSize)
+        return CGSize(width: UIView.noIntrinsicMetric, height: thumbSize)
     }
     
 //    func alignmentRectInsets() -> UIEdgeInsets {
     override var alignmentRectInsets: UIEdgeInsets {
-        return UIEdgeInsetsMake(4.0, 2.0, 4.0, 2.0)
+        return UIEdgeInsets.init(top: 4.0, left: 2.0, bottom: 4.0, right: 2.0)
     }
     
     override func layoutSublayers(of layer: CALayer) {
@@ -329,7 +329,7 @@ import UIKit
         let diameter = max(thumbSize,44.0)
         let r = CGRect(x: center.x - diameter/2.0, y: center.y - diameter/2.0, width: diameter, height: diameter)
         if r.contains(pt){
-            sendActions(for: UIControlEvents.touchDown)
+            sendActions(for: UIControl.Event.touchDown)
             return true
         }
         return false
@@ -341,7 +341,7 @@ import UIKit
         let newValue = valueForLocation(point: pt)
         setValue(newValue, animated: false)
         if(continuous){
-            sendActions(for: UIControlEvents.valueChanged)
+            sendActions(for: UIControl.Event.valueChanged)
             actionBlock(self,newValue,false)
         }
         return true
@@ -354,7 +354,7 @@ import UIKit
             setValue(newValue, animated: false)
         }
         actionBlock(self,_value,true)
-        sendActions(for: [UIControlEvents.valueChanged, UIControlEvents.touchUpInside])
+        sendActions(for: [UIControl.Event.valueChanged, UIControl.Event.touchUpInside])
         
     }