diff --git a/Package.swift b/Package.swift
index 64ae30a..d8d625f 100644
--- a/Package.swift
+++ b/Package.swift
@@ -3,6 +3,13 @@ import PackageDescription
 
 var package = Package(
     name: "Saby",
+    platforms: [
+        .iOS(.v11),
+        .macOS(.v10_13),
+        .macCatalyst(.v13),
+        .watchOS(.v4),
+        .tvOS(.v11),
+    ],
     products: [
         .library(
             name: "SabyConcurrency",