diff --git a/Package.swift b/Package.swift
index 62cf149..3c486d6 100644
--- a/Package.swift
+++ b/Package.swift
@@ -8,11 +8,11 @@ let package = Package(
         .library(name: "SkipLib", targets: ["SkipLib"]),
     ],
     dependencies: [
-        .package(url: "https://source.skip.tools/skip.git", from: "0.6.56"),
-        .package(url: "https://source.skip.tools/skip-unit.git", from: "0.2.17"),
+        .package(url: "https://source.skip.tools/skip.git", from: "0.6.57"),
+        .package(url: "https://source.skip.tools/skip-unit.git", from: "0.2.18"),
     ],
     targets: [
         .target(name: "SkipLib", dependencies: [.product(name: "SkipUnit", package: "skip-unit", condition: .when(platforms: [.macOS]))], plugins: [.plugin(name: "skipstone", package: "skip")]),
-        .testTarget(name: "SkipLibTests", dependencies: ["SkipLib", .product(name: "SkipTest", package: "skip")], plugins: [.plugin(name: "skipstone", package: "skip")]),
+        .testTarget(name: "SkipLibTests", dependencies: ["SkipLib", .product(name: "SkipTest", package: "skip", condition: .when(platforms: [.macOS]))], plugins: [.plugin(name: "skipstone", package: "skip")]),
     ]
 )