diff --git a/.swift-version b/.swift-version
index 389f774..8012ebb 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-4.0
\ No newline at end of file
+4.2
\ No newline at end of file
diff --git a/Highlighter.podspec b/Highlighter.podspec
index b88ccc8..1264512 100644
--- a/Highlighter.podspec
+++ b/Highlighter.podspec
@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'Highlighter'
-  s.version          = '1.2.0'
+  s.version          = '1.3.0'
   s.summary          = 'Highlight whatever you want!'
 
   s.description      = <<-DESC
@@ -22,7 +22,7 @@ Pod::Spec.new do |s|
   s.source           = { :git => 'https://github.com/younatics/Highlighter.git', :tag => s.version.to_s }
   s.source_files     = 'Highlighter/*.swift'
 
-  s.ios.deployment_target = '8.0'
+  s.ios.deployment_target = '9.0'
   s.frameworks = 'Foundation'
   s.requires_arc = true
 end
diff --git a/Highlighter.xcodeproj/project.pbxproj b/Highlighter.xcodeproj/project.pbxproj
index 53791ac..a892dd5 100644
--- a/Highlighter.xcodeproj/project.pbxproj
+++ b/Highlighter.xcodeproj/project.pbxproj
@@ -207,13 +207,13 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.3;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -262,11 +262,11 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.3;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -292,7 +292,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -313,7 +313,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
diff --git a/Highlighter.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/Highlighter.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/Highlighter.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/Highlighter/Highlightable.swift b/Highlighter/Highlightable.swift
index 471576b..16c1a61 100644
--- a/Highlighter/Highlightable.swift
+++ b/Highlighter/Highlightable.swift
@@ -12,11 +12,11 @@ public protocol Highlightable: class {
     var textValue: String? { get }
     var attributedTextValue: NSAttributedString? { get set }
 
-    func highlight(text: String, normal normalAttributes: [NSAttributedStringKey : Any]?, highlight highlightAttributes: [NSAttributedStringKey : Any]?)
+    func highlight(text: String, normal normalAttributes: [NSAttributedString.Key : Any]?, highlight highlightAttributes: [NSAttributedString.Key : Any]?)
 }
 
 extension Highlightable {
-    public func highlight(text: String, normal normalAttributes: [NSAttributedStringKey : Any]?, highlight highlightAttributes: [NSAttributedStringKey : Any]?) {
+    public func highlight(text: String, normal normalAttributes: [NSAttributedString.Key : Any]?, highlight highlightAttributes: [NSAttributedString.Key : Any]?) {
         guard let inputText = self.textValue else { return }
 
         let highlightRanges = inputText.lowercased().ranges(of: text)
diff --git a/Highlighter/HighlightableContainer.swift b/Highlighter/HighlightableContainer.swift
index e2ac542..f370a78 100644
--- a/Highlighter/HighlightableContainer.swift
+++ b/Highlighter/HighlightableContainer.swift
@@ -16,11 +16,11 @@ public protocol HighlightableContainer: class {
     ///   - normalAttributes: Attributes to apply to non-matching text
     ///   - highlightAttributes: Attributes to apply (highlight) to matching text
     ///   - type: (optional) Only search `Highlightable`s of this type
-    func highlight(text: String, normal normalAttributes: [NSAttributedStringKey : Any]?, highlight highlightAttributes: [NSAttributedStringKey : Any]?, type: Highlightable.Type?)
+    func highlight(text: String, normal normalAttributes: [NSAttributedString.Key : Any]?, highlight highlightAttributes: [NSAttributedString.Key : Any]?, type: Highlightable.Type?)
 }
 
 extension HighlightableContainer {
-    public func highlight(text: String, normal normalAttributes: [NSAttributedStringKey : Any]?, highlight highlightAttributes: [NSAttributedStringKey : Any]?, type: Highlightable.Type? = nil) {
+    public func highlight(text: String, normal normalAttributes: [NSAttributedString.Key : Any]?, highlight highlightAttributes: [NSAttributedString.Key : Any]?, type: Highlightable.Type? = nil) {
         let mirror = Mirror(reflecting: self)
         mirror.children
             .flatMap { $0.value as? Highlightable }
diff --git a/Highlighter/NSAttributedString+Extensions.swift b/Highlighter/NSAttributedString+Extensions.swift
index 58a1e14..54686de 100644
--- a/Highlighter/NSAttributedString+Extensions.swift
+++ b/Highlighter/NSAttributedString+Extensions.swift
@@ -9,7 +9,7 @@
 import Foundation
 
 extension NSAttributedString {
-    static func highlight(ranges: [Range<String.Index>], at searchText: String, in originText: String, normal normalAttributes: [NSAttributedStringKey : Any]?, highlight highlightAttributes: [NSAttributedStringKey : Any]?) -> NSAttributedString {
+    static func highlight(ranges: [Range<String.Index>], at searchText: String, in originText: String, normal normalAttributes: [NSAttributedString.Key : Any]?, highlight highlightAttributes: [NSAttributedString.Key : Any]?) -> NSAttributedString {
         let startString = String(originText[..<ranges[0].lowerBound])
         let highlightString = NSMutableAttributedString(string: startString, attributes: normalAttributes)
 
@@ -30,20 +30,20 @@ extension NSAttributedString {
         return highlightString
     }
 
-    private static func continueAttribute(originText: String, upperBound: String.Index, lowerBound: String.Index, normalAttributes: [NSAttributedStringKey : Any]?) -> NSMutableAttributedString {
+    private static func continueAttribute(originText: String, upperBound: String.Index, lowerBound: String.Index, normalAttributes: [NSAttributedString.Key : Any]?) -> NSMutableAttributedString {
         let range = Range(uncheckedBounds: (upperBound, lowerBound))
         let continueString = String(originText[range])
         let continueAttributeString = NSMutableAttributedString(string: continueString, attributes: normalAttributes)
         return continueAttributeString
     }
 
-    private static func containAttribute(originText: String, bound: Range<String.Index>, attributes: [NSAttributedStringKey : Any]?) -> NSMutableAttributedString {
+    private static func containAttribute(originText: String, bound: Range<String.Index>, attributes: [NSAttributedString.Key : Any]?) -> NSMutableAttributedString {
         let containedString = String(originText[bound])
         let containedAttributeString = NSMutableAttributedString(string: containedString, attributes: attributes)
         return containedAttributeString
     }
 
-    private static func endAttribute(originText: String, bound: String.Index, normalAttributes: [NSAttributedStringKey : Any]?) -> NSMutableAttributedString {
+    private static func endAttribute(originText: String, bound: String.Index, normalAttributes: [NSAttributedString.Key : Any]?) -> NSMutableAttributedString {
         let endString = String(originText[bound...])
         let endAttributeString = NSMutableAttributedString(string: endString, attributes: normalAttributes)
         return endAttributeString