diff --git a/Package.swift b/Package.swift
index 65c4318..dad3cc7 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.1
+// swift-tools-version:5.3
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
@@ -7,7 +7,7 @@ let package = Package(
     name: "Spin.Swift",
     platforms: [
         .macOS(.v10_10),
-        .iOS(.v8),
+        .iOS(.v9),
         .tvOS(.v9),
         .watchOS(.v3)
     ],
@@ -49,7 +49,7 @@ let package = Package(
             path: "Sources/ReactiveSwift"),
         .target(
             name: "SpinRxSwift",
-            dependencies: ["SpinCommon", "RxSwift", "RxRelay"],
+            dependencies: ["SpinCommon", "RxSwift", .product(name: "RxRelay", package: "RxSwift")],
             path: "Sources/RxSwift"),
         .testTarget(
             name: "SpinCommonTests",
@@ -65,7 +65,7 @@ let package = Package(
             path: "Tests/ReactiveSwiftTests"),
         .testTarget(
             name: "SpinRxSwiftTests",
-            dependencies: ["SpinRxSwift", "RxBlocking"],
+            dependencies: ["SpinRxSwift", .product(name: "RxBlocking", package: "RxSwift")],
             path: "Tests/RxSwiftTests"
         ),
     ]
diff --git a/Spin.Swift.xcodeproj/project.pbxproj b/Spin.Swift.xcodeproj/project.pbxproj
index f691279..1638cbc 100644
--- a/Spin.Swift.xcodeproj/project.pbxproj
+++ b/Spin.Swift.xcodeproj/project.pbxproj
@@ -1116,7 +1116,7 @@
 		74CE43092443B8E2008DD85C /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1140;
+				LastUpgradeCheck = 1200;
 				ORGANIZATIONNAME = Spinners;
 				TargetAttributes = {
 					742CD3382443FC8900A9AB4C = {
@@ -1601,14 +1601,14 @@
 				);
 				INFOPLIST_FILE = "SpinReactiveSwift-iOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinReactiveSwift;
 				PRODUCT_NAME = SpinReactiveSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -1617,7 +1617,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Debug;
@@ -1637,14 +1637,14 @@
 				);
 				INFOPLIST_FILE = "SpinReactiveSwift-iOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinReactiveSwift;
 				PRODUCT_NAME = SpinReactiveSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -1653,7 +1653,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VALIDATE_PRODUCT = YES;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
@@ -1671,21 +1671,21 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = SpinCommon/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinCommon;
 				PRODUCT_NAME = SpinCommon;
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SKIP_INSTALL = YES;
 				SUPPORTED_PLATFORMS = "macosx watchsimulator watchos appletvsimulator appletvos iphonesimulator iphoneos";
 				SWIFT_VERSION = 5.0;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Debug;
@@ -1702,21 +1702,21 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = SpinCommon/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinCommon;
 				PRODUCT_NAME = SpinCommon;
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SKIP_INSTALL = YES;
 				SUPPORTED_PLATFORMS = "macosx watchsimulator watchos appletvsimulator appletvos iphonesimulator iphoneos";
 				SWIFT_VERSION = 5.0;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Release;
@@ -1737,20 +1737,20 @@
 				);
 				INFOPLIST_FILE = "SpinReactiveSwift-macOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinReactiveSwift;
 				PRODUCT_NAME = SpinReactiveSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Debug;
@@ -1771,20 +1771,20 @@
 				);
 				INFOPLIST_FILE = "SpinReactiveSwift-macOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinReactiveSwift;
 				PRODUCT_NAME = SpinReactiveSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Release;
@@ -1805,14 +1805,14 @@
 				);
 				INFOPLIST_FILE = "SpinReactiveSwift-watchOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinReactiveSwift;
 				PRODUCT_NAME = SpinReactiveSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -1820,7 +1820,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 4;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Debug;
@@ -1841,14 +1841,14 @@
 				);
 				INFOPLIST_FILE = "SpinReactiveSwift-watchOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinReactiveSwift;
 				PRODUCT_NAME = SpinReactiveSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -1856,7 +1856,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 4;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VALIDATE_PRODUCT = YES;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
@@ -1877,14 +1877,14 @@
 				);
 				INFOPLIST_FILE = "SpinReactiveSwift-tvOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinReactiveSwift;
 				PRODUCT_NAME = SpinReactiveSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -1892,7 +1892,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Debug;
@@ -1912,14 +1912,14 @@
 				);
 				INFOPLIST_FILE = "SpinReactiveSwift-tvOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinReactiveSwift;
 				PRODUCT_NAME = SpinReactiveSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -1927,7 +1927,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VALIDATE_PRODUCT = YES;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
@@ -1950,7 +1950,7 @@
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinCombine;
 				PRODUCT_NAME = SpinCombine;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -1981,7 +1981,7 @@
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinCombine;
 				PRODUCT_NAME = SpinCombine;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2014,7 +2014,7 @@
 					"@executable_path/../Frameworks",
 					"@loader_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinCombine;
 				PRODUCT_NAME = SpinCombine;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2043,7 +2043,7 @@
 					"@executable_path/../Frameworks",
 					"@loader_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinCombine;
 				PRODUCT_NAME = SpinCombine;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2072,7 +2072,7 @@
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinCombine;
 				PRODUCT_NAME = SpinCombine;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2103,7 +2103,7 @@
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinCombine;
 				PRODUCT_NAME = SpinCombine;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2134,7 +2134,7 @@
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinCombine;
 				PRODUCT_NAME = SpinCombine;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2164,7 +2164,7 @@
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinCombine;
 				PRODUCT_NAME = SpinCombine;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2204,6 +2204,7 @@
 				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 = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -2267,6 +2268,7 @@
 				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 = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -2312,14 +2314,14 @@
 				);
 				INFOPLIST_FILE = "SpinRxSwift-iOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinRxSwift;
 				PRODUCT_NAME = SpinRxSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2328,7 +2330,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Debug;
@@ -2348,14 +2350,14 @@
 				);
 				INFOPLIST_FILE = "SpinRxSwift-iOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinRxSwift;
 				PRODUCT_NAME = SpinRxSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2364,7 +2366,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VALIDATE_PRODUCT = YES;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
@@ -2386,20 +2388,20 @@
 				);
 				INFOPLIST_FILE = "SpinRxSwift-macOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinRxSwift;
 				PRODUCT_NAME = SpinRxSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Debug;
@@ -2420,20 +2422,20 @@
 				);
 				INFOPLIST_FILE = "SpinRxSwift-macOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinRxSwift;
 				PRODUCT_NAME = SpinRxSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Release;
@@ -2454,14 +2456,14 @@
 				);
 				INFOPLIST_FILE = "SpinRxSwift-watchOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinRxSwift;
 				PRODUCT_NAME = SpinRxSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2469,7 +2471,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 4;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Debug;
@@ -2490,14 +2492,14 @@
 				);
 				INFOPLIST_FILE = "SpinRxSwift-watchOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinRxSwift;
 				PRODUCT_NAME = SpinRxSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2505,7 +2507,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 4;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VALIDATE_PRODUCT = YES;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
@@ -2526,14 +2528,14 @@
 				);
 				INFOPLIST_FILE = "SpinRxSwift-tvOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinRxSwift;
 				PRODUCT_NAME = SpinRxSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2541,7 +2543,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
 			name = Debug;
@@ -2561,14 +2563,14 @@
 				);
 				INFOPLIST_FILE = "SpinRxSwift-tvOS/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MARKETING_VERSION = 0.20.0;
+				MARKETING_VERSION = 0.21.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.github.spinners.SpinRxSwift;
 				PRODUCT_NAME = SpinRxSwift;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -2576,7 +2578,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VALIDATE_PRODUCT = YES;
 				WATCHOS_DEPLOYMENT_TARGET = 3.0;
 			};
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-iOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-iOS.xcscheme
index 1a878a9..42a102a 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-iOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-macOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-macOS.xcscheme
index 9db7665..3674a5e 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-macOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-macOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-tvOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-tvOS.xcscheme
index 9ae99ba..a738240 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-tvOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-tvOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-watchOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-watchOS.xcscheme
index 5cc6292..b941eec 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-watchOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCombine-watchOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCommon.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCommon.xcscheme
index 70e7ed9..2e7742e 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCommon.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinCommon.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-iOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-iOS.xcscheme
index d5e7d02..0f917b0 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-iOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-macOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-macOS.xcscheme
index b582ff8..c3a0d6f 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-macOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-macOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-tvOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-tvOS.xcscheme
index 67952cc..58d8d00 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-tvOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-tvOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-watchOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-watchOS.xcscheme
index 1db5dfd..ff43379 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-watchOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinReactiveSwift-watchOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-iOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-iOS.xcscheme
index df79f9b..d1afbad 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-iOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-macOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-macOS.xcscheme
index 7cb6a3b..b70e2a6 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-macOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-macOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-tvOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-tvOS.xcscheme
index dcfb366..5d3a77d 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-tvOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-tvOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-watchOS.xcscheme b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-watchOS.xcscheme
index 895401b..dfe8b0b 100644
--- a/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-watchOS.xcscheme
+++ b/Spin.Swift.xcodeproj/xcshareddata/xcschemes/SpinRxSwift-watchOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1140"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/xcarthage.sh b/xcarthage.sh
new file mode 100755
index 0000000..f3bc14e
--- /dev/null
+++ b/xcarthage.sh
@@ -0,0 +1,19 @@
+# carthage-build.sh
+# Usage example: ./carthage-build.sh --platform iOS
+
+set -euo pipefail
+
+xcconfig=$(mktemp /tmp/static.xcconfig.XXXXXX)
+trap 'rm -f "$xcconfig"' INT TERM HUP EXIT
+
+# For Xcode 12 make sure EXCLUDED_ARCHS is set to arm architectures otherwise
+# the build will fail on lipo due to duplicate architectures.
+
+CURRENT_XCODE_VERSION=$(xcodebuild -version | grep "Build version" | cut -d' ' -f3)
+echo "EXCLUDED_ARCHS__EFFECTIVE_PLATFORM_SUFFIX_simulator__NATIVE_ARCH_64_BIT_x86_64__XCODE_1200__BUILD_$CURRENT_XCODE_VERSION = arm64 arm64e armv7 armv7s armv6 armv8" >> $xcconfig
+
+echo 'EXCLUDED_ARCHS__EFFECTIVE_PLATFORM_SUFFIX_simulator__NATIVE_ARCH_64_BIT_x86_64__XCODE_1200 = $(EXCLUDED_ARCHS__EFFECTIVE_PLATFORM_SUFFIX_simulator__NATIVE_ARCH_64_BIT_x86_64__XCODE_1200__BUILD_$(XCODE_PRODUCT_BUILD_VERSION))' >> $xcconfig
+echo 'EXCLUDED_ARCHS = $(inherited) $(EXCLUDED_ARCHS__EFFECTIVE_PLATFORM_SUFFIX_$(EFFECTIVE_PLATFORM_SUFFIX)__NATIVE_ARCH_64_BIT_$(NATIVE_ARCH_64_BIT)__XCODE_$(XCODE_VERSION_MAJOR))' >> $xcconfig
+
+export XCODE_XCCONFIG_FILE="$xcconfig"
+carthage build "$@"