diff --git a/Package.swift b/Package.swift
index bc33e15..4965151 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.1
+// swift-tools-version:5.3
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
@@ -7,6 +7,7 @@ let package = Package(
     name: "MobKitCore",
     platforms: [
         .iOS(.v10),
+        .macOS(.v11),
         .watchOS(.v6)
     ],
     products: [