diff --git a/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..919434a
--- /dev/null
+++ b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
diff --git a/.swiftpm/xcode/xcuserdata/guillaumebourachot.xcuserdatad/xcschemes/xcschememanagement.plist b/.swiftpm/xcode/xcuserdata/guillaumebourachot.xcuserdatad/xcschemes/xcschememanagement.plist
new file mode 100644
index 0000000..a8c7efa
--- /dev/null
+++ b/.swiftpm/xcode/xcuserdata/guillaumebourachot.xcuserdatad/xcschemes/xcschememanagement.plist
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>SwiftTypes.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+	<key>SuppressBuildableAutocreation</key>
+	<dict>
+		<key>SwiftTypes</key>
+		<dict>
+			<key>primary</key>
+			<true/>
+		</dict>
+		<key>SwiftTypesTests</key>
+		<dict>
+			<key>primary</key>
+			<true/>
+		</dict>
+	</dict>
+</dict>
+</plist>
diff --git a/Package.swift b/Package.swift
new file mode 100644
index 0000000..e6a2572
--- /dev/null
+++ b/Package.swift
@@ -0,0 +1,16 @@
+// swift-tools-version:5.1
+
+import PackageDescription
+
+let pkg = Package(name: "SwiftTypes")
+pkg.products = [
+    .library(name: "SwiftTypes", targets: ["SwiftTypes"]),
+]
+
+let pmk: Target = .target(name: "SwiftTypes")
+pmk.path = "SwiftTypes"
+pkg.swiftLanguageVersions = [.v5]
+pkg.targets = [
+    pmk,
+    .testTarget(name: "SwiftTypesTests", dependencies: ["SwiftTypes"], path: "SwiftTypesTests"),
+]
diff --git a/SwiftTypes.xcodeproj/project.pbxproj b/SwiftTypes.xcodeproj/project.pbxproj
index 859c6ae..30e1521 100644
--- a/SwiftTypes.xcodeproj/project.pbxproj
+++ b/SwiftTypes.xcodeproj/project.pbxproj
@@ -49,6 +49,7 @@
 /* Begin PBXFileReference section */
 		0059A84B1C204F9400EB59BD /* SwiftTypes.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = SwiftTypes.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		0059A84F1C204F9400EB59BD /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		27B17A32247CFB240040FD23 /* Package.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Package.swift; sourceTree = "<group>"; };
 		710CE64D1C15D9D40059C0AD /* SwiftTypes.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = SwiftTypes.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		710CE6501C15D9D40059C0AD /* SwiftTypes.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SwiftTypes.h; sourceTree = "<group>"; };
 		710CE6521C15D9D40059C0AD /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -118,6 +119,7 @@
 		710CE6431C15D9D40059C0AD = {
 			isa = PBXGroup;
 			children = (
+				27B17A32247CFB240040FD23 /* Package.swift */,
 				710CE64F1C15D9D40059C0AD /* SwiftTypes */,
 				710CE65B1C15D9D40059C0AD /* SwiftTypesTests */,
 				0059A84C1C204F9400EB59BD /* SwiftTypesWatchOS */,
@@ -318,6 +320,7 @@
 					};
 					710CE6561C15D9D40059C0AD = {
 						CreatedOnToolsVersion = 7.1.1;
+						DevelopmentTeam = 23A5AVAGZ8;
 						LastSwiftMigration = 0900;
 					};
 					719156731D1D39C900FC55C9 = {
@@ -660,6 +663,7 @@
 		710CE6651C15D9D40059C0AD /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				DEVELOPMENT_TEAM = 23A5AVAGZ8;
 				INFOPLIST_FILE = SwiftTypesTests/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = kreactive.SwiftTypesTests;
@@ -671,6 +675,7 @@
 		710CE6661C15D9D40059C0AD /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				DEVELOPMENT_TEAM = 23A5AVAGZ8;
 				INFOPLIST_FILE = SwiftTypesTests/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = kreactive.SwiftTypesTests;