diff --git a/Package.swift b/Package.swift
index 9ba3923..311be81 100644
--- a/Package.swift
+++ b/Package.swift
@@ -5,7 +5,13 @@ import PackageDescription
 
 let package = Package(
     name: "CallableKit",
-    platforms: [.macOS(.v14)],
+    platforms: [
+        .macOS(.v10_15),
+        .iOS(.v13),
+        .tvOS(.v13),
+        .watchOS(.v6),
+        .macCatalyst(.v13),
+    ],
     products: [
         .library(name: "CallableKit", targets: ["CallableKit"]),
         .library(name: "CallableKitURLSessionStub", targets: ["CallableKitURLSessionStub"]),
diff --git a/Sources/CallableKitURLSessionStub/URLSessionStubClient.swift b/Sources/CallableKitURLSessionStub/URLSessionStubClient.swift
index ef3766e..f4b0002 100644
--- a/Sources/CallableKitURLSessionStub/URLSessionStubClient.swift
+++ b/Sources/CallableKitURLSessionStub/URLSessionStubClient.swift
@@ -98,6 +98,7 @@ private func makeEncoder() -> JSONEncoder {
     return encoder
 }
 
+#if compiler(<6.0)
 #if canImport(FoundationNetworking)
 extension URLSession {
     func data(for request: URLRequest) async throws -> (Data, URLResponse) {
@@ -121,3 +122,4 @@ extension URLSession {
     }
 }
 #endif
+#endif