diff --git a/.swift-version b/.swift-version
index bf77d54..819e07a 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-4.2
+5.0
diff --git a/KeyboardLayoutGuide/KeyboardLayoutGuide.xcodeproj/project.pbxproj b/KeyboardLayoutGuide/KeyboardLayoutGuide.xcodeproj/project.pbxproj
index 7251858..ccba455 100644
--- a/KeyboardLayoutGuide/KeyboardLayoutGuide.xcodeproj/project.pbxproj
+++ b/KeyboardLayoutGuide/KeyboardLayoutGuide.xcodeproj/project.pbxproj
@@ -146,7 +146,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0900;
-				LastUpgradeCheck = 0900;
+				LastUpgradeCheck = 1020;
 				ORGANIZATIONNAME = freshos;
 				TargetAttributes = {
 					9902DE0A1FBB24A5009E0D48 = {
@@ -167,6 +167,7 @@
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,
+				Base,
 			);
 			mainGroup = 9902DE011FBB24A5009E0D48;
 			productRefGroup = 9902DE0C1FBB24A5009E0D48 /* Products */;
@@ -238,6 +239,7 @@
 				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;
@@ -245,6 +247,7 @@
 				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;
@@ -279,7 +282,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -299,6 +302,7 @@
 				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;
@@ -306,6 +310,7 @@
 				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;
@@ -332,7 +337,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -357,7 +362,6 @@
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -379,7 +383,6 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.freshos.KeyboardLayoutGuide;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
@@ -393,7 +396,6 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.freshos.KeyboardLayoutGuideTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -407,7 +409,6 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.freshos.KeyboardLayoutGuideTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
diff --git a/KeyboardLayoutGuide/KeyboardLayoutGuide.xcodeproj/xcshareddata/xcschemes/KeyboardLayoutGuide.xcscheme b/KeyboardLayoutGuide/KeyboardLayoutGuide.xcodeproj/xcshareddata/xcschemes/KeyboardLayoutGuide.xcscheme
index 968840d..7df8880 100644
--- a/KeyboardLayoutGuide/KeyboardLayoutGuide.xcodeproj/xcshareddata/xcschemes/KeyboardLayoutGuide.xcscheme
+++ b/KeyboardLayoutGuide/KeyboardLayoutGuide.xcodeproj/xcshareddata/xcschemes/KeyboardLayoutGuide.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1000"
+   LastUpgradeVersion = "1020"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/KeyboardLayoutGuide/KeyboardLayoutGuide/Keyboard+LayoutGuide.swift b/KeyboardLayoutGuide/KeyboardLayoutGuide/Keyboard+LayoutGuide.swift
index b7b6ece..e8aee65 100644
--- a/KeyboardLayoutGuide/KeyboardLayoutGuide/Keyboard+LayoutGuide.swift
+++ b/KeyboardLayoutGuide/KeyboardLayoutGuide/Keyboard+LayoutGuide.swift
@@ -21,7 +21,7 @@ public extension UIView {
     
     /// A layout guide representing the inset for the keyboard.
     /// Use this layout guide’s top anchor to create constraints pinning to the top of the keyboard.
-    public var keyboardLayoutGuide: KeyboardLayoutGuide {
+    var keyboardLayoutGuide: KeyboardLayoutGuide {
         get {
             if let obj = objc_getAssociatedObject(self, &AssociatedKeys.keyboardLayoutGuide) as? KeyboardLayoutGuide {
                 return obj