diff --git a/CocoaFob.podspec b/CocoaFob.podspec
index 4ba920f..704341e 100644
--- a/CocoaFob.podspec
+++ b/CocoaFob.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
   s.name             = 'CocoaFob'
-  s.version          = '2.3.0'
-  s.swift_versions   = ["5.6", "5.5", "5.4", '5.3', '5.2', '5.1', '5.0']
+  s.version          = '2.4.0'
+  s.swift_versions   = ["5.7", "5.6", "5.5", "5.4", '5.3', '5.2', '5.1', '5.0']
   s.summary          = 'macOS app registration code verification & generation.'
   s.description      = <<-DESC
 CocoaFob is a set of helper code snippets for registration code generation and
@@ -17,7 +17,7 @@ FastSpring <http://fastspring.com>.
 
   s.module_name = 'CocoaFob'
   s.platform = :osx
-  s.osx.deployment_target = '10.10'
+  s.osx.deployment_target = '10.13'
 
   s.source_files = ['swift5/CocoaFob/*.swift']
 end
diff --git a/Package.swift b/Package.swift
index 820aa61..5dabbda 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,10 +1,12 @@
-// swift-tools-version:5.3
+// swift-tools-version: 5.5
 
 import PackageDescription
 
 let package = Package(
     name: "CocoaFob",
-    platforms: [.macOS(.v10_10)],
+    platforms: [
+      .macOS(.v10_13),
+    ],
     products: [
         .library(
             name: "CocoaFob",
diff --git a/swift5/CocoaFob.xcodeproj/project.pbxproj b/swift5/CocoaFob.xcodeproj/project.pbxproj
index b30592f..5a74a8d 100644
--- a/swift5/CocoaFob.xcodeproj/project.pbxproj
+++ b/swift5/CocoaFob.xcodeproj/project.pbxproj
@@ -265,7 +265,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0700;
-				LastUpgradeCheck = 1200;
+				LastUpgradeCheck = 1420;
 				ORGANIZATIONNAME = PixelEspresso;
 				TargetAttributes = {
 					C739DCC11B48DFA00074D8F2 = {
@@ -403,6 +403,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
 				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
@@ -420,7 +421,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.10;
+				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
@@ -462,6 +463,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
 				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -473,7 +475,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.10;
+				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = macosx;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
@@ -488,6 +490,7 @@
 			buildSettings = {
 				CLANG_ENABLE_MODULES = YES;
 				COMBINE_HIDPI_IMAGES = YES;
+				DEAD_CODE_STRIPPING = YES;
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
@@ -509,6 +512,7 @@
 			buildSettings = {
 				CLANG_ENABLE_MODULES = YES;
 				COMBINE_HIDPI_IMAGES = YES;
+				DEAD_CODE_STRIPPING = YES;
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
@@ -528,8 +532,10 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				COMBINE_HIDPI_IMAGES = YES;
+				DEAD_CODE_STRIPPING = YES;
 				INFOPLIST_FILE = CocoaFobTests/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
+				MACOSX_DEPLOYMENT_TARGET = "$(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET)";
 				PRODUCT_BUNDLE_IDENTIFIER = com.pixelespresso.CocoaFobTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
@@ -540,8 +546,10 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				COMBINE_HIDPI_IMAGES = YES;
+				DEAD_CODE_STRIPPING = YES;
 				INFOPLIST_FILE = CocoaFobTests/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
+				MACOSX_DEPLOYMENT_TARGET = "$(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET)";
 				PRODUCT_BUNDLE_IDENTIFIER = com.pixelespresso.CocoaFobTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
@@ -552,8 +560,10 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CODE_SIGN_IDENTITY = "-";
+				DEAD_CODE_STRIPPING = YES;
 				DEPLOYMENT_POSTPROCESSING = YES;
 				DSTROOT = "";
+				MACOSX_DEPLOYMENT_TARGET = "$(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 			};
 			name = Debug;
@@ -562,8 +572,10 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CODE_SIGN_IDENTITY = "-";
+				DEAD_CODE_STRIPPING = YES;
 				DEPLOYMENT_POSTPROCESSING = YES;
 				DSTROOT = "";
+				MACOSX_DEPLOYMENT_TARGET = "$(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 			};
 			name = Release;
diff --git a/swift5/CocoaFob.xcodeproj/xcshareddata/xcschemes/CocoaFob.xcscheme b/swift5/CocoaFob.xcodeproj/xcshareddata/xcschemes/CocoaFob.xcscheme
index 91fe355..5d81272 100644
--- a/swift5/CocoaFob.xcodeproj/xcshareddata/xcschemes/CocoaFob.xcscheme
+++ b/swift5/CocoaFob.xcodeproj/xcshareddata/xcschemes/CocoaFob.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1200"
+   LastUpgradeVersion = "1420"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"