diff --git a/CHANGELOG.md b/CHANGELOG.md
index 03602d0c..a57f216d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,10 +2,22 @@
 
 ## Unreleased
 
+### New features
+
+- Add Swift 6 and strict concurrency support, including `Sendable` conformances for `Device` and its supporting types. ([#437](https://github.com/devicekit/DeviceKit/pull/437))
+
+### Breaking changes
+
+- Require main-actor access for UIKit-backed device properties, including `isPhone`, `isPad`, screen information, battery information, and orientation, and make `Device.identifier` read-only. The Xcode project now requires Swift 6, and the Xcode and Swift Package Manager watchOS deployment targets increase to watchOS 6.0. ([#437](https://github.com/devicekit/DeviceKit/pull/437))
+
 ### Maintenance
 
 - Simplify GYB device definitions with named feature parameters and defaults for unsupported features, preserving the generated Swift output. ([#508](https://github.com/devicekit/DeviceKit/pull/508))
 
+### Contributors
+
+Thanks to [SomeRandomiOSDev](https://github.com/SomeRandomiOSDev) for contributing Swift 6 and strict concurrency support in [#437](https://github.com/devicekit/DeviceKit/pull/437)!
+
 ## Version 5.8.0
 
 Releasedate: 2026-03-03
diff --git a/DeviceKit.xcodeproj/project.pbxproj b/DeviceKit.xcodeproj/project.pbxproj
index ca9c0053..2ed01222 100644
--- a/DeviceKit.xcodeproj/project.pbxproj
+++ b/DeviceKit.xcodeproj/project.pbxproj
@@ -396,12 +396,12 @@
 				SUPPORTS_MACCATALYST = YES;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2,3,4,7";
 				TVOS_DEPLOYMENT_TARGET = 13.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
+				WATCHOS_DEPLOYMENT_TARGET = 6.0;
 			};
 			name = Debug;
 		};
@@ -454,13 +454,13 @@
 				SKIP_INSTALL = YES;
 				SUPPORTED_PLATFORMS = "appletvos appletvsimulator iphoneos iphonesimulator watchos watchsimulator xros xrsimulator";
 				SUPPORTS_MACCATALYST = YES;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2,3,4,7";
 				TVOS_DEPLOYMENT_TARGET = 13.0;
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
-				WATCHOS_DEPLOYMENT_TARGET = 4.0;
+				WATCHOS_DEPLOYMENT_TARGET = 6.0;
 			};
 			name = Release;
 		};
@@ -506,7 +506,7 @@
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OBJC_INTERFACE_HEADER_NAME = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TVOS_DEPLOYMENT_TARGET = 13.0;
 			};
 			name = Debug;
@@ -548,7 +548,7 @@
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OBJC_INTERFACE_HEADER_NAME = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-O";
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TVOS_DEPLOYMENT_TARGET = 13.0;
 				VALIDATE_PRODUCT = YES;
 			};
diff --git a/Package.swift b/Package.swift
index e796c1cf..ebd01941 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.3
+// swift-tools-version:6.0
 // ===----------------------------------------------------------------------=== //
 //
 // This source file is part of the DeviceKit open source project
@@ -17,7 +17,7 @@ let package = Package(
     platforms: [
         .iOS(.v13),
         .tvOS(.v13),
-        .watchOS(.v4)
+        .watchOS(.v6)
     ],
     products: [
         // Products define the executables and libraries produced by a package, and make them visible to other packages.
@@ -44,5 +44,5 @@ let package = Package(
             resources: [.process("../Source/PrivacyInfo.xcprivacy")]
         )
     ],
-    swiftLanguageVersions: [.v5]
+    swiftLanguageModes: [.v5, .v6]
 )
diff --git a/Package@swift-5.6.swift b/Package@swift-5.6.swift
new file mode 100644
index 00000000..b0adaa20
--- /dev/null
+++ b/Package@swift-5.6.swift
@@ -0,0 +1,52 @@
+// swift-tools-version:5.6
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the DeviceKit open source project
+//
+// Copyright © 2014 - 2018 Dennis Weissmann and the DeviceKit project authors
+//
+// License: https://github.com/dennisweissmann/DeviceKit/blob/master/LICENSE
+// Contributors: https://github.com/dennisweissmann/DeviceKit#contributors
+//
+//===----------------------------------------------------------------------===//
+
+import PackageDescription
+
+let package = Package(
+    name: "DeviceKit",
+    platforms: [
+        .iOS(.v13),
+        .tvOS(.v13),
+        .watchOS(.v6)
+    ],
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "DeviceKit",
+            targets: ["DeviceKit"]
+        )
+    ],
+    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: "DeviceKit",
+            dependencies: [],
+            path: "Source",
+            resources: [.process("PrivacyInfo.xcprivacy")],
+            swiftSettings: [
+                .enableExperimentalFeature("StrictConcurrency"),
+            ]
+        ),
+        .testTarget(
+            name: "DeviceKitTests",
+            dependencies: ["DeviceKit"],
+            path: "Tests",
+            resources: [.process("../Source/PrivacyInfo.xcprivacy")],
+            swiftSettings: [
+                .enableExperimentalFeature("StrictConcurrency"),
+            ]
+        )
+    ],
+    swiftLanguageVersions: [.v5]
+)
diff --git a/README.md b/README.md
index 10abba0f..53f61abb 100644
--- a/README.md
+++ b/README.md
@@ -41,9 +41,9 @@ See our detailed [changelog](CHANGELOG.md) for the latest features, improvements
 
 ## Requirements
 
-- iOS 11.0+
-- tvOS 11.0+
-- watchOS 4.0+
+- iOS 13.0+
+- tvOS 13.0+
+- watchOS 6.0+
 
 ## Installation
 DeviceKit can be installed in various ways.
diff --git a/Source/Device.generated.swift b/Source/Device.generated.swift
index bd5a0638..0d33a2f5 100644
--- a/Source/Device.generated.swift
+++ b/Source/Device.generated.swift
@@ -48,7 +48,7 @@ import Foundation
 ///         showError()
 ///     }
 ///
-public enum Device {
+public enum Device: Sendable {
   #if os(iOS)
     /// Device is an [iPod touch (5th generation)](https://support.apple.com/kb/SP657)
     ///
@@ -606,7 +606,7 @@ public enum Device {
   }
 
   /// Gets the identifier from the system, such as "iPhone7,1".
-  public static var identifier: String = {
+  public static let identifier: String = {
     var systemInfo = utsname()
     uname(&systemInfo)
     let mirror = Mirror(reflecting: systemInfo.machine)
@@ -1171,6 +1171,7 @@ public enum Device {
     }
 
     /// Returns whether the device is an iPhone (real or simulator)
+    @MainActor
     public var isPhone: Bool {
       return (isOneOf(Device.allPhones)
               || isOneOf(Device.allSimulatorPhones)
@@ -1178,6 +1179,7 @@ public enum Device {
     }
 
     /// Returns whether the device is an iPad (real or simulator)
+    @MainActor
     public var isPad: Bool {
       return isOneOf(Device.allPads)
               || isOneOf(Device.allSimulatorPads)
@@ -1190,6 +1192,7 @@ public enum Device {
       return Device.realDevice(from: self)
     }
 
+    @MainActor
     public var isZoomed: Bool? {
       guard isCurrent else { return nil }
       if Int(UIScreen.main.scale.rounded()) == 3 {
@@ -1426,6 +1429,9 @@ public enum Device {
   /// The name identifying the device (e.g. "Dennis' iPhone").
   /// As of iOS 16, this will return a generic String like "iPhone", unless your app has additional entitlements.
   /// See the follwing link for more information: https://developer.apple.com/documentation/uikit/uidevice/1620015-name
+  #if !os(watchOS) && canImport(UIKit)
+  @MainActor
+  #endif
   public var name: String? {
     guard isCurrent else { return nil }
     #if os(watchOS)
@@ -1438,6 +1444,9 @@ public enum Device {
   }
 
   /// The name of the operating system running on the device represented by the receiver (e.g. "iOS" or "tvOS").
+  #if !os(watchOS) && (os(iOS) || canImport(UIKit))
+  @MainActor
+  #endif
   public var systemName: String? {
     guard isCurrent else { return nil }
     #if os(watchOS)
@@ -1456,6 +1465,9 @@ public enum Device {
   }
 
   /// The current version of the operating system (e.g. 8.4 or 9.2).
+  #if !os(watchOS) && canImport(UIKit)
+  @MainActor
+  #endif
   public var systemVersion: String? {
     guard isCurrent else { return nil }
     #if os(watchOS)
@@ -1468,6 +1480,9 @@ public enum Device {
   }
 
   /// The model of the device (e.g. "iPhone" or "iPod Touch").
+  #if !os(watchOS) && canImport(UIKit)
+  @MainActor
+  #endif
   public var model: String? {
     guard isCurrent else { return nil }
     #if os(watchOS)
@@ -1480,6 +1495,9 @@ public enum Device {
   }
 
   /// The model of the device as a localized string.
+  #if !os(watchOS) && canImport(UIKit)
+  @MainActor
+  #endif
   public var localizedModel: String? {
     guard isCurrent else { return nil }
     #if os(watchOS)
@@ -1644,6 +1662,9 @@ public enum Device {
   }
 
   /// True when a Guided Access session is currently active; otherwise, false.
+  #if os(iOS)
+  @MainActor
+  #endif
   public var isGuidedAccessSessionActive: Bool {
     #if os(iOS)
       #if swift(>=4.2)
@@ -1657,6 +1678,9 @@ public enum Device {
   }
 
   /// The brightness level of the screen.
+  #if os(iOS)
+  @MainActor
+  #endif
   public var screenBrightness: Int {
     #if os(iOS)
     return Int(UIScreen.main.brightness * 100)
@@ -2024,7 +2048,7 @@ extension Device {
    - Charging:  The device is plugged into power and the battery is less than 100% charged.
    - Unplugged: The device is not plugged into power; the battery is discharging.
    */
-  public enum BatteryState: CustomStringConvertible, Equatable {
+  public enum BatteryState: CustomStringConvertible, Equatable, Sendable {
     /// The device is plugged into power and the battery is 100% charged or the device is the iOS Simulator.
     case full
     /// The device is plugged into power and the battery is less than 100% charged.
@@ -2035,6 +2059,7 @@ extension Device {
     case unplugged(Int)
 
     #if os(iOS)
+      @MainActor
       fileprivate init() {
         let wasBatteryMonitoringEnabled = UIDevice.current.isBatteryMonitoringEnabled
         UIDevice.current.isBatteryMonitoringEnabled = true
@@ -2091,12 +2116,18 @@ extension Device {
   }
 
   /// The state of the battery
+  #if os(iOS)
+  @MainActor
+  #endif
   public var batteryState: BatteryState? {
     guard isCurrent else { return nil }
     return BatteryState()
   }
 
   /// Battery level ranges from 0 (fully discharged) to 100 (100% charged).
+  #if os(iOS)
+  @MainActor
+  #endif
   public var batteryLevel: Int? {
     guard isCurrent else { return nil }
     switch BatteryState() {
@@ -2152,16 +2183,18 @@ extension Device {
       - Portrait:  The device is in Portrait Orientation
       - Unknown:   The device orientation is unknown.
     */
-    public enum Orientation {
+    public enum Orientation: Sendable {
       case landscape
       case portrait
       case unknown
     }
 
+    @MainActor
     public var orientation: Orientation {
-      if UIDevice.current.orientation.isLandscape {
+      let orientation = UIDevice.current.orientation
+      if orientation.isLandscape {
         return .landscape
-      } else if UIDevice.current.orientation.isPortrait {
+      } else if orientation.isPortrait {
         return .portrait
       } else {
         return .unknown
@@ -2237,7 +2270,7 @@ extension Device {
     - firstGenerationUsbC: 1st Generation Apple Pencil (USB-C)
     - pro: Apple Pencil Pro
    */
-  public struct ApplePencilSupport: OptionSet {
+  public struct ApplePencilSupport: OptionSet, Sendable {
 
     public var rawValue: UInt
 
@@ -2304,7 +2337,7 @@ extension Device {
 // MARK: Cameras
 extension Device {
 
-  public enum CameraType {
+  public enum CameraType: Sendable {
     @available(*, deprecated, renamed: "wide")
     case normal
 
@@ -2507,7 +2540,7 @@ extension Device {
 
 extension Device {
 
-  public enum CPU: Comparable {
+  public enum CPU: Comparable, Sendable {
   #if os(iOS) || os(tvOS)
     case a4
     case a5
diff --git a/Source/Device.swift.gyb b/Source/Device.swift.gyb
index 7a61e94a..cee9c829 100644
--- a/Source/Device.swift.gyb
+++ b/Source/Device.swift.gyb
@@ -643,7 +643,7 @@ import Foundation
 ///         showError()
 ///     }
 ///
-public enum Device {
+public enum Device: Sendable {
   #if os(iOS)
 % for device in iOSDevices:
     /// ${device.comment}
@@ -683,7 +683,7 @@ public enum Device {
   }
 
   /// Gets the identifier from the system, such as "iPhone7,1".
-  public static var identifier: String = {
+  public static let identifier: String = {
     var systemInfo = utsname()
     uname(&systemInfo)
     let mirror = Mirror(reflecting: systemInfo.machine)
@@ -875,6 +875,7 @@ public enum Device {
     }
 
     /// Returns whether the device is an iPhone (real or simulator)
+    @MainActor
     public var isPhone: Bool {
       return (isOneOf(Device.allPhones)
               || isOneOf(Device.allSimulatorPhones)
@@ -882,6 +883,7 @@ public enum Device {
     }
 
     /// Returns whether the device is an iPad (real or simulator)
+    @MainActor
     public var isPad: Bool {
       return isOneOf(Device.allPads)
               || isOneOf(Device.allSimulatorPads)
@@ -894,6 +896,7 @@ public enum Device {
       return Device.realDevice(from: self)
     }
 
+    @MainActor
     public var isZoomed: Bool? {
       guard isCurrent else { return nil }
       if Int(UIScreen.main.scale.rounded()) == 3 {
@@ -1130,6 +1133,9 @@ public enum Device {
   /// The name identifying the device (e.g. "Dennis' iPhone").
   /// As of iOS 16, this will return a generic String like "iPhone", unless your app has additional entitlements.
   /// See the follwing link for more information: https://developer.apple.com/documentation/uikit/uidevice/1620015-name
+  #if !os(watchOS) && canImport(UIKit)
+  @MainActor
+  #endif
   public var name: String? {
     guard isCurrent else { return nil }
     #if os(watchOS)
@@ -1142,6 +1148,9 @@ public enum Device {
   }
 
   /// The name of the operating system running on the device represented by the receiver (e.g. "iOS" or "tvOS").
+  #if !os(watchOS) && (os(iOS) || canImport(UIKit))
+  @MainActor
+  #endif
   public var systemName: String? {
     guard isCurrent else { return nil }
     #if os(watchOS)
@@ -1160,6 +1169,9 @@ public enum Device {
   }
 
   /// The current version of the operating system (e.g. 8.4 or 9.2).
+  #if !os(watchOS) && canImport(UIKit)
+  @MainActor
+  #endif
   public var systemVersion: String? {
     guard isCurrent else { return nil }
     #if os(watchOS)
@@ -1172,6 +1184,9 @@ public enum Device {
   }
 
   /// The model of the device (e.g. "iPhone" or "iPod Touch").
+  #if !os(watchOS) && canImport(UIKit)
+  @MainActor
+  #endif
   public var model: String? {
     guard isCurrent else { return nil }
     #if os(watchOS)
@@ -1184,6 +1199,9 @@ public enum Device {
   }
 
   /// The model of the device as a localized string.
+  #if !os(watchOS) && canImport(UIKit)
+  @MainActor
+  #endif
   public var localizedModel: String? {
     guard isCurrent else { return nil }
     #if os(watchOS)
@@ -1224,6 +1242,9 @@ public enum Device {
   }
 
   /// True when a Guided Access session is currently active; otherwise, false.
+  #if os(iOS)
+  @MainActor
+  #endif
   public var isGuidedAccessSessionActive: Bool {
     #if os(iOS)
       #if swift(>=4.2)
@@ -1237,6 +1258,9 @@ public enum Device {
   }
 
   /// The brightness level of the screen.
+  #if os(iOS)
+  @MainActor
+  #endif
   public var screenBrightness: Int {
     #if os(iOS)
     return Int(UIScreen.main.brightness * 100)
@@ -1354,7 +1378,7 @@ extension Device {
    - Charging:  The device is plugged into power and the battery is less than 100% charged.
    - Unplugged: The device is not plugged into power; the battery is discharging.
    */
-  public enum BatteryState: CustomStringConvertible, Equatable {
+  public enum BatteryState: CustomStringConvertible, Equatable, Sendable {
     /// The device is plugged into power and the battery is 100% charged or the device is the iOS Simulator.
     case full
     /// The device is plugged into power and the battery is less than 100% charged.
@@ -1365,6 +1389,7 @@ extension Device {
     case unplugged(Int)
 
     #if os(iOS)
+      @MainActor
       fileprivate init() {
         let wasBatteryMonitoringEnabled = UIDevice.current.isBatteryMonitoringEnabled
         UIDevice.current.isBatteryMonitoringEnabled = true
@@ -1421,12 +1446,18 @@ extension Device {
   }
 
   /// The state of the battery
+  #if os(iOS)
+  @MainActor
+  #endif
   public var batteryState: BatteryState? {
     guard isCurrent else { return nil }
     return BatteryState()
   }
 
   /// Battery level ranges from 0 (fully discharged) to 100 (100% charged).
+  #if os(iOS)
+  @MainActor
+  #endif
   public var batteryLevel: Int? {
     guard isCurrent else { return nil }
     switch BatteryState() {
@@ -1482,16 +1513,18 @@ extension Device {
       - Portrait:  The device is in Portrait Orientation
       - Unknown:   The device orientation is unknown.
     */
-    public enum Orientation {
+    public enum Orientation: Sendable {
       case landscape
       case portrait
       case unknown
     }
 
+    @MainActor
     public var orientation: Orientation {
-      if UIDevice.current.orientation.isLandscape {
+      let orientation = UIDevice.current.orientation
+      if orientation.isLandscape {
         return .landscape
-      } else if UIDevice.current.orientation.isPortrait {
+      } else if orientation.isPortrait {
         return .portrait
       } else {
         return .unknown
@@ -1567,7 +1600,7 @@ extension Device {
     - firstGenerationUsbC: 1st Generation Apple Pencil (USB-C)
     - pro: Apple Pencil Pro
    */
-  public struct ApplePencilSupport: OptionSet {
+  public struct ApplePencilSupport: OptionSet, Sendable {
 
     public var rawValue: UInt
 
@@ -1627,7 +1660,7 @@ extension Device {
 // MARK: Cameras
 extension Device {
 
-  public enum CameraType {
+  public enum CameraType: Sendable {
     @available(*, deprecated, renamed: "wide")
     case normal
 
@@ -1809,7 +1842,7 @@ watchOS_cpus = [
 
 extension Device {
 
-  public enum CPU: Comparable {
+  public enum CPU: Comparable, Sendable {
   #if os(iOS) || os(tvOS)
 % for cpu in iOS_cpus:
     case ${cpu.name}
diff --git a/Tests/Tests.swift b/Tests/Tests.swift
index 1e87af88..585f1fa3 100644
--- a/Tests/Tests.swift
+++ b/Tests/Tests.swift
@@ -116,6 +116,7 @@ class DeviceKitTests: XCTestCase {
   // MARK: - iOS
   #if os(iOS)
 
+  @MainActor
   func testIsPhoneIsPadIsPod() {
     // Test for https://github.com/devicekit/DeviceKit/issues/165 to prevent it from happening in the future.
 
@@ -151,6 +152,7 @@ class DeviceKitTests: XCTestCase {
     }
   }
 
+  @MainActor
   func testSystemName() {
     if UIDevice.current.userInterfaceIdiom == .pad {
       XCTAssertEqual(device.systemName, "iPadOS")
@@ -396,6 +398,7 @@ class DeviceKitTests: XCTestCase {
     }
   }
 
+  @MainActor
   func testIsPad() {
     Device.allPads.forEach { XCTAssertTrue($0.isPad) }
   }
@@ -513,11 +516,13 @@ class DeviceKitTests: XCTestCase {
     ])
   }
 
+  @MainActor
   func testGuidedAccessSession() {
     XCTAssertFalse(Device.current.isGuidedAccessSessionActive)
   }
 
   // enable once unit tests can be run on device
+  @MainActor
   func testKeepsBatteryMonitoringState() {
     UIDevice.current.isBatteryMonitoringEnabled = true
     XCTAssertTrue(UIDevice.current.isBatteryMonitoringEnabled)