diff --git a/Package.swift b/Package.swift
index bb13dfe..ad2d1a5 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,12 +1,13 @@
-// swift-tools-version:5.1
+// swift-tools-version:5.7
 import PackageDescription
 
 let package = Package(
     name: "CloudStorage",
     platforms: [
-        .macOS(.v10_15),
-        .iOS(.v13),
-        .tvOS(.v13),
+        .macOS(.v12),
+        .iOS(.v14),
+        .tvOS(.v14),
+        .watchOS(.v9),
     ],
     products: [
         .library(name: "CloudStorage", targets: ["CloudStorage"]),
diff --git a/Sources/CloudStorage/CloudStorageSync.swift b/Sources/CloudStorage/CloudStorageSync.swift
index 6a1308a..61ed795 100644
--- a/Sources/CloudStorage/CloudStorageSync.swift
+++ b/Sources/CloudStorage/CloudStorageSync.swift
@@ -30,7 +30,7 @@ public class CloudStorageSync: ObservableObject {
             object: nil)
         ubiquitousKvs.synchronize()
 
-        #if canImport(UIKit)
+        #if canImport(UIKit) && !os(watchOS)
         NotificationCenter.default.addObserver(
             ubiquitousKvs,
             selector: #selector(NSUbiquitousKeyValueStore.synchronize),