diff --git a/Package.swift b/Package.swift
index 833ce92..160b256 100644
--- a/Package.swift
+++ b/Package.swift
@@ -5,7 +5,10 @@ import PackageDescription
 
 let package = Package(
     name: "MagicExt-OAuth",
-    
+    platforms: [
+        .iOS(.v10),
+        .macOS(.v10_12)
+    ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.
         .library(