diff --git a/Guardian.xcodeproj/project.pbxproj b/Guardian.xcodeproj/project.pbxproj
index 7ca5121..13e2cf6 100644
--- a/Guardian.xcodeproj/project.pbxproj
+++ b/Guardian.xcodeproj/project.pbxproj
@@ -638,8 +638,9 @@
 		5F2037C41D5E1E3E0005D2E2 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
+				BuildIndependentTargetsInParallel = YES;
 				LastSwiftUpdateCheck = 0810;
-				LastUpgradeCheck = 0930;
+				LastUpgradeCheck = 1540;
 				ORGANIZATIONNAME = Auth0;
 				TargetAttributes = {
 					5F2037CC1D5E1E3E0005D2E2 = {
@@ -856,6 +857,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -875,6 +877,7 @@
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = NO;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -886,6 +889,7 @@
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -900,7 +904,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
@@ -915,6 +919,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -934,6 +939,7 @@
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = NO;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -945,6 +951,7 @@
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
@@ -953,7 +960,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_COMPILATION_MODE = wholemodule;
@@ -969,12 +976,13 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CLANG_ENABLE_MODULES = YES;
-				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
+				CODE_SIGN_IDENTITY = "";
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = "";
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				ENABLE_MODULE_VERIFIER = YES;
 				INFOPLIST_FILE = Guardian/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
@@ -983,6 +991,7 @@
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
+				MODULE_VERIFIER_SUPPORTED_LANGUAGE_STANDARDS = "gnu99 gnu++11";
 				PRODUCT_BUNDLE_IDENTIFIER = com.auth0.sdk.Guardian;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -996,12 +1005,13 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CLANG_ENABLE_MODULES = YES;
-				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
+				CODE_SIGN_IDENTITY = "";
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = "";
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				ENABLE_MODULE_VERIFIER = YES;
 				INFOPLIST_FILE = Guardian/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
@@ -1010,6 +1020,7 @@
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
+				MODULE_VERIFIER_SUPPORTED_LANGUAGE_STANDARDS = "gnu99 gnu++11";
 				PRODUCT_BUNDLE_IDENTIFIER = com.auth0.sdk.Guardian;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
diff --git a/Guardian.xcodeproj/xcshareddata/xcschemes/Guardian.xcscheme b/Guardian.xcodeproj/xcshareddata/xcschemes/Guardian.xcscheme
index e8d60ce..67b44d2 100644
--- a/Guardian.xcodeproj/xcshareddata/xcschemes/Guardian.xcscheme
+++ b/Guardian.xcodeproj/xcshareddata/xcschemes/Guardian.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0930"
+   LastUpgradeVersion = "1540"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Guardian.xcodeproj/xcshareddata/xcschemes/GuardianApp.xcscheme b/Guardian.xcodeproj/xcshareddata/xcschemes/GuardianApp.xcscheme
index 2bf07af..2227ae3 100644
--- a/Guardian.xcodeproj/xcshareddata/xcschemes/GuardianApp.xcscheme
+++ b/Guardian.xcodeproj/xcshareddata/xcschemes/GuardianApp.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1420"
+   LastUpgradeVersion = "1540"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Guardian.xcodeproj/xcshareddata/xcschemes/GuardianTests.xcscheme b/Guardian.xcodeproj/xcshareddata/xcschemes/GuardianTests.xcscheme
index 906ebc0..863c465 100644
--- a/Guardian.xcodeproj/xcshareddata/xcschemes/GuardianTests.xcscheme
+++ b/Guardian.xcodeproj/xcshareddata/xcschemes/GuardianTests.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1420"
+   LastUpgradeVersion = "1540"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Guardian/Keys/ASNPublicKeyDecodable.swift b/Guardian/Keys/ASNPublicKeyDecodable.swift
index 62e92dd..86b33b9 100644
--- a/Guardian/Keys/ASNPublicKeyDecodable.swift
+++ b/Guardian/Keys/ASNPublicKeyDecodable.swift
@@ -34,12 +34,21 @@ public protocol ASNPublicKeyDecodable: PublicKeyDataConvertible {
 extension ASNPublicKeyDecodable {
 
     public var attributes: PublicKeyAttributes? {
-        let asn = { (bytes: UnsafePointer<UInt8>) -> PublicKeyAttributes? in
-            guard bytes.pointee == 0x30 else { return nil }
+        let asn = { (buffer: UnsafeRawBufferPointer) -> PublicKeyAttributes? in
+            guard 
+                let bytes = buffer.bindMemory(to: UInt8.self).baseAddress,
+                bytes.pointee == 0x30
+            else { return nil }
+            
             let (modulusBytes, totalLength) = self.length(from: bytes + 1)
-            guard totalLength > 0, let (exponentBytes, modulus) = self.data(from: modulusBytes) else { return nil }
-            guard let (end, exponent) = self.data(from: exponentBytes) else { return nil }
-            guard abs(end.distance(to: modulusBytes)) == totalLength else { return nil }
+            
+            guard
+                totalLength > 0,
+                let (exponentBytes, modulus) = self.data(from: modulusBytes),
+                let (end, exponent) = self.data(from: exponentBytes),
+                abs(end.distance(to: modulusBytes)) == totalLength
+            else { return nil }
+            
             return PublicKeyAttributes(modulus: modulus, exponent: exponent)
         }
         return self.data?.withUnsafeBytes(asn)