diff --git a/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
diff --git a/Package.swift b/Package.swift
@@ -1,8 +1,31 @@
+// swift-tools-version:5.2
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
 import PackageDescription
 
 let package = Package(
-	name: "SwiftyTimer",
-	dependencies: [],
-    exclude: ["Sources/Info.plist", "Sources/SwiftyTimer.h", "SwiftyTimerTests"]
-
-)
+    name: "SwiftyTimer",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "SwiftyTimer",
+            targets: ["SwiftyTimer"]),
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "SwiftyTimer",
+            dependencies: [],
+            path: "Sources",
+            exclude: ["Info.plist", "SwiftyTimer.h"]
+        ),
+        .testTarget(
+            name: "SwiftyTimerTests",
+            dependencies: ["SwiftyTimer"]),
+    ]
+)
diff --git a/README.md b/README.md
@@ -108,6 +108,13 @@ Just add to your Cartfile:
 github "radex/SwiftyTimer"
 ```
 
+#### Swift Package Manager
+- iOS: Open Xcode, File->Swift Packages, search input **https://github.com/radex/SwiftyTimer.git**, and then select Version Up to Next Major **2.1.1** < .
+- Or add dependencies in your `Package.swift`:
+```ruby
+.package(url: "https://github.com/radex/SwiftyTimer.git", .upToNextMajor(from: "2.1.1")),
+```
+
 #### Manually
 
 Simply copy `Sources/SwiftyTimer.swift` to your Xcode project.

diff --git a/Tests/LinuxMain.swift b/Tests/LinuxMain.swift
@@ -0,0 +1,7 @@
+import XCTest
+
+import SwiftyTimerTests
+
+var tests = [XCTestCaseEntry]()
+tests += SwiftyTimerTests.allTests()
+XCTMain(tests)
diff --git a/Tests/SwiftyTimerTests/SwiftyTimerTests.swift b/Tests/SwiftyTimerTests/SwiftyTimerTests.swift
@@ -0,0 +1,15 @@
+import XCTest
+@testable import SwiftyTimer
+
+final class SwiftyTimerTests: XCTestCase {
+    func testExample() {
+        // This is an example of a functional test case.
+        // Use XCTAssert and related functions to verify your tests produce the correct
+        // results.
+        XCTAssertEqual(SwiftyTimer().text, "Hello, World!")
+    }
+
+    static var allTests = [
+        ("testExample", testExample),
+    ]
+}
diff --git a/Tests/SwiftyTimerTests/XCTestManifests.swift b/Tests/SwiftyTimerTests/XCTestManifests.swift
@@ -0,0 +1,9 @@
+import XCTest
+
+#if !canImport(ObjectiveC)
+public func allTests() -> [XCTestCaseEntry] {
+    return [
+        testCase(SwiftyTimerTests.allTests),
+    ]
+}
+#endif