diff --git a/.gitignore b/.gitignore
index 712f71d..ef583ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,8 @@
 # Xcode
 #
 build/
+DerivedData/
+
 *.pbxuser
 !default.pbxuser
 *.mode1v3
@@ -18,6 +20,14 @@ DerivedData
 *.xcscmblueprint
 *.xcuserstate
 
+
+### Xcode Patch ###
+*.xcodeproj/*
+!*.xcodeproj/project.pbxproj
+!*.xcodeproj/xcshareddata/
+!*.xcworkspace/contents.xcworkspacedata
+/*.gcno
+
 # CocoaPods
 #
 # We recommend against adding the Pods directory to your .gitignore. However
diff --git a/ELFoundation.xcodeproj/project.pbxproj b/ELFoundation.xcodeproj/project.pbxproj
index 654b116..a3320ba 100644
--- a/ELFoundation.xcodeproj/project.pbxproj
+++ b/ELFoundation.xcodeproj/project.pbxproj
@@ -403,7 +403,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0700;
-				LastUpgradeCheck = 0930;
+				LastUpgradeCheck = 1020;
 				ORGANIZATIONNAME = WalmartLabs;
 				TargetAttributes = {
 					CA8CD5591B7A9DCA00DA8BF7 = {
@@ -418,16 +418,17 @@
 					};
 					CACF2A141A9614D20084EFAE = {
 						CreatedOnToolsVersion = 6.3;
-						LastSwiftMigration = 0920;
+						LastSwiftMigration = 1020;
 					};
 				};
 			};
 			buildConfigurationList = CACF2A041A9614D20084EFAE /* Build configuration list for PBXProject "ELFoundation" */;
 			compatibilityVersion = "Xcode 3.2";
-			developmentRegion = English;
+			developmentRegion = en;
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,
+				Base,
 			);
 			mainGroup = CACF2A001A9614D20084EFAE;
 			productRefGroup = CACF2A0B1A9614D20084EFAE /* Products */;
@@ -577,6 +578,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
@@ -624,7 +626,7 @@
 				ONLY_ACTIVE_ARCH = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -646,7 +648,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = QADeployment;
 		};
@@ -663,8 +665,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.walmartlabs.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = QADeployment;
 		};
@@ -831,6 +832,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
@@ -879,7 +881,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -890,6 +892,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
@@ -932,7 +935,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -955,7 +958,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -974,7 +977,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -991,8 +994,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.walmartlabs.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -1005,8 +1007,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.walmartlabs.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
diff --git a/ELFoundation.xcodeproj/xcshareddata/xcschemes/ELFoundation.xcscheme b/ELFoundation.xcodeproj/xcshareddata/xcschemes/ELFoundation.xcscheme
index f0ec313..79f39b1 100644
--- a/ELFoundation.xcodeproj/xcshareddata/xcschemes/ELFoundation.xcscheme
+++ b/ELFoundation.xcodeproj/xcshareddata/xcschemes/ELFoundation.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0930"
+   LastUpgradeVersion = "1020"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/ELFoundation.xcodeproj/xcshareddata/xcschemes/ELFoundation_osx.xcscheme b/ELFoundation.xcodeproj/xcshareddata/xcschemes/ELFoundation_osx.xcscheme
index f86b3b2..5fe08a9 100644
--- a/ELFoundation.xcodeproj/xcshareddata/xcschemes/ELFoundation_osx.xcscheme
+++ b/ELFoundation.xcodeproj/xcshareddata/xcschemes/ELFoundation_osx.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0930"
+   LastUpgradeVersion = "1020"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/ELFoundation/Extensions/Array.swift b/ELFoundation/Extensions/Array.swift
index e42b47b..24a4e55 100644
--- a/ELFoundation/Extensions/Array.swift
+++ b/ELFoundation/Extensions/Array.swift
@@ -84,7 +84,7 @@ public extension Array where Element : Equatable {
      Removes each occurrence of `element` from this array.
      */
     mutating func removeElement(_ element: Element) {
-        while let index = self.index(of: element) {
+        while let index = self.firstIndex(of: element) {
             self.remove(at: index)
         }
     }
diff --git a/ELFoundation/Extensions/NSBundle.swift b/ELFoundation/Extensions/NSBundle.swift
index 856ca02..20416e3 100644
--- a/ELFoundation/Extensions/NSBundle.swift
+++ b/ELFoundation/Extensions/NSBundle.swift
@@ -16,7 +16,7 @@ public extension Bundle {
     
      Example: com.walmartlabs.thgfoundation
     */
-    public func reverseBundleIdentifier() -> String? {
+    func reverseBundleIdentifier() -> String? {
         if let id = bundleIdentifier {
             let components: [String] = id.components(separatedBy: ".")
             let reverseComponents = Array(components.reversed())
diff --git a/ELFoundation/Extensions/NSObject.swift b/ELFoundation/Extensions/NSObject.swift
index 01dd8be..c943e72 100644
--- a/ELFoundation/Extensions/NSObject.swift
+++ b/ELFoundation/Extensions/NSObject.swift
@@ -10,12 +10,12 @@ import Foundation
 
 public extension NSObject {
     /// Returns the NSBundle containing self's class.
-    @objc public static func bundle() -> Bundle {
+    @objc static func bundle() -> Bundle {
         return Bundle(for: self)
     }
     
     /// Returns the NSBundle containing self's class.
-    @objc public func bundle() -> Bundle {
+    @objc func bundle() -> Bundle {
         return Swift.type(of: self).bundle()
     }
 }
diff --git a/ELFoundation/Extensions/NSThread.swift b/ELFoundation/Extensions/NSThread.swift
index 68fe9f0..ec4a67a 100644
--- a/ELFoundation/Extensions/NSThread.swift
+++ b/ELFoundation/Extensions/NSThread.swift
@@ -21,7 +21,7 @@ public extension Thread {
      - parameter locale: The locale for the date formatter.
      - returns: The date formatter.
      */
-    public class func dateFormatter(_ format: String, locale: Locale? = Locale.current) -> DateFormatter {
+    class func dateFormatter(_ format: String, locale: Locale? = Locale.current) -> DateFormatter {
         let threadDictionary = Thread.current.threadDictionary
 
         var cache: Dictionary<String, DateFormatter>? = threadDictionary.object(forKey: formatterCacheKey) as? Dictionary<String, DateFormatter>
diff --git a/ELFoundation/Utilities/Swizzling.swift b/ELFoundation/Utilities/Swizzling.swift
index ffcb669..0258fec 100644
--- a/ELFoundation/Utilities/Swizzling.swift
+++ b/ELFoundation/Utilities/Swizzling.swift
@@ -17,7 +17,7 @@ import Foundation
 */
 public extension NSObject {
     /// Swizzles a class method on an Objective-C object.
-    public class func swizzleClassMethod(_ originalSelector: Selector, swizzledSelector:Selector) {
+    class func swizzleClassMethod(_ originalSelector: Selector, swizzledSelector:Selector) {
         if let c: AnyClass = object_getClass(self) {
             let originalMethod = class_getClassMethod(c, originalSelector)
             let swizzledMethod = class_getClassMethod(c, swizzledSelector)
@@ -33,7 +33,7 @@ public extension NSObject {
     }
     
     /// Swizzles an instance method on an Objective-C object.
-    public class func swizzleInstanceMethod(_ originalSelector: Selector, swizzledSelector:Selector) {
+    class func swizzleInstanceMethod(_ originalSelector: Selector, swizzledSelector:Selector) {
         let originalMethod = class_getInstanceMethod(self, originalSelector)
         let swizzledMethod = class_getInstanceMethod(self, swizzledSelector)
         
diff --git a/ELFoundation_osx/Info.plist b/ELFoundation_osx/Info.plist
index 9194b9b..3b36f0a 100644
--- a/ELFoundation_osx/Info.plist
+++ b/ELFoundation_osx/Info.plist
@@ -15,13 +15,13 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>3.0.0</string>
+	<string>3.1.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>NSHumanReadableCopyright</key>
-	<string>Copyright © 2015 WalmartLabs. All rights reserved.</string>
+	<string>Copyright © 2019 WalmartLabs. All rights reserved.</string>
 	<key>NSPrincipalClass</key>
 	<string></string>
 </dict>
diff --git a/README.md b/README.md
index 3162d21..cc9961e 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ ELFoundation is a collection of Swift utilities for iOS development.
 
 ## Requirements
 
-ELFoundation requires Swift 4 and Xcode 9.2.
+ELFoundation requires Swift 5 and Xcode 10.2.
 
 ## Installation