diff --git a/PromiseKit.xcodeproj/project.pbxproj b/PromiseKit.xcodeproj/project.pbxproj
index 11493d20f..f0a71e449 100644
--- a/PromiseKit.xcodeproj/project.pbxproj
+++ b/PromiseKit.xcodeproj/project.pbxproj
@@ -835,13 +835,9 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				SWIFT_INSTALL_OBJC_HEADER = NO;
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Debug;
 		};
@@ -849,13 +845,9 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				SWIFT_INSTALL_OBJC_HEADER = NO;
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Release;
 		};
@@ -865,11 +857,8 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				SWIFT_INSTALL_OBJC_HEADER = NO;
 				SWIFT_OBJC_BRIDGING_HEADER = Tests/Bridging/Infrastructure.h;
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Debug;
 		};
@@ -879,11 +868,8 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				SWIFT_INSTALL_OBJC_HEADER = NO;
 				SWIFT_OBJC_BRIDGING_HEADER = Tests/Bridging/Infrastructure.h;
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Release;
 		};
@@ -893,10 +879,7 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				SWIFT_INSTALL_OBJC_HEADER = NO;
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Debug;
 		};
@@ -906,10 +889,7 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				LD_RUNPATH_SEARCH_PATHS = "@executable_path/Frameworks @loader_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				SWIFT_INSTALL_OBJC_HEADER = NO;
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Release;
 		};
@@ -919,12 +899,9 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_INSTALL_OBJC_HEADER = NO;
 				SWIFT_SUPPRESS_WARNINGS = YES;
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Debug;
 		};
@@ -934,12 +911,9 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_INSTALL_OBJC_HEADER = NO;
 				SWIFT_SUPPRESS_WARNINGS = YES;
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Release;
 		};
@@ -988,9 +962,9 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				INFOPLIST_FILE = "$(SRCROOT)/Sources/Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				LD_DYLIB_INSTALL_NAME = "@rpath";
-				MACOSX_DEPLOYMENT_TARGET = 10.10;
+				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = org.promisekit;
 				PRODUCT_BUNDLE_PACKAGE_TYPE = BNDL;
@@ -999,9 +973,9 @@
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 4.0;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 11.0;
 				VERSIONING_SYSTEM = "apple-generic";
-				WATCHOS_DEPLOYMENT_TARGET = 2.0;
+				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Debug;
 		};
@@ -1048,18 +1022,18 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				INFOPLIST_FILE = "$(SRCROOT)/Sources/Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				LD_DYLIB_INSTALL_NAME = "@rpath";
-				MACOSX_DEPLOYMENT_TARGET = 10.10;
+				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_BUNDLE_IDENTIFIER = org.promisekit;
 				PRODUCT_BUNDLE_PACKAGE_TYPE = BNDL;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SUPPORTED_PLATFORMS = "macosx appletvsimulator appletvos watchsimulator iphonesimulator watchos iphoneos";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_VERSION = 4.0;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 11.0;
 				VERSIONING_SYSTEM = "apple-generic";
-				WATCHOS_DEPLOYMENT_TARGET = 2.0;
+				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Release;
 		};
@@ -1109,16 +1083,12 @@
 				GCC_WARN_UNUSED_LABEL = YES;
 				GCC_WARN_UNUSED_PARAMETER = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				LD_DYLIB_INSTALL_NAME = "$(DYLIB_INSTALL_NAME_BASE:standardizepath)/$(EXECUTABLE_PATH)";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_BUNDLE_PACKAGE_TYPE = FMWK;
 				SKIP_INSTALL = YES;
 				SWIFT_TREAT_WARNINGS_AS_ERRORS = NO;
 				TARGETED_DEVICE_FAMILY = "1,2,3,4";
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Debug;
 		};
@@ -1168,16 +1138,12 @@
 				GCC_WARN_UNUSED_LABEL = YES;
 				GCC_WARN_UNUSED_PARAMETER = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				LD_DYLIB_INSTALL_NAME = "$(DYLIB_INSTALL_NAME_BASE:standardizepath)/$(EXECUTABLE_PATH)";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_BUNDLE_PACKAGE_TYPE = FMWK;
 				SKIP_INSTALL = YES;
 				SWIFT_TREAT_WARNINGS_AS_ERRORS = NO;
 				TARGETED_DEVICE_FAMILY = "1,2,3,4";
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Release;
 		};
@@ -1188,12 +1154,9 @@
 				CLANG_ENABLE_MODULES = YES;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_INSTALL_OBJC_HEADER = NO;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Debug;
 		};
@@ -1204,11 +1167,8 @@
 				CLANG_ENABLE_MODULES = YES;
 				LD_RUNPATH_SEARCH_PATHS = "@executable_path/Frameworks @loader_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_INSTALL_OBJC_HEADER = NO;
-				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Release;
 		};