diff --git a/Package.swift b/Package.swift
index 093adeb..816d1dd 100644
--- a/Package.swift
+++ b/Package.swift
@@ -33,7 +33,7 @@ let package = Package(
             swiftSettings: [
                 .unsafeFlags(["-Xfrontend", "-warn-long-function-bodies=100"], .when(configuration: .debug)),
                 .unsafeFlags(["-Xfrontend", "-warn-long-expression-type-checking=100"], .when(configuration: .debug)),
-                .unsafeFlags(["-cross-module-optimization"]),
+                .unsafeFlags(["-experimental-package-cmo", "-experimental-allow-non-resilient-access"]),
                 .enableExperimentalFeature("CodeItemMacros"),
                 .enableUpcomingFeature("ExistentialAny"),
                 .enableUpcomingFeature("InternalImportsByDefault"),
@@ -47,7 +47,7 @@ let package = Package(
             swiftSettings: [
                 .unsafeFlags(["-Xfrontend", "-warn-long-function-bodies=100"], .when(configuration: .debug)),
                 .unsafeFlags(["-Xfrontend", "-warn-long-expression-type-checking=100"], .when(configuration: .debug)),
-                .unsafeFlags(["-cross-module-optimization"]),
+                .unsafeFlags(["-experimental-package-cmo", "-experimental-allow-non-resilient-access"]),
                 .enableUpcomingFeature("ExistentialAny"),
                 .enableUpcomingFeature("InternalImportsByDefault"),
             ]
@@ -61,7 +61,7 @@ let package = Package(
             swiftSettings: [
                 .unsafeFlags(["-Xfrontend", "-warn-long-function-bodies=100"], .when(configuration: .debug)),
                 .unsafeFlags(["-Xfrontend", "-warn-long-expression-type-checking=100"], .when(configuration: .debug)),
-                .unsafeFlags(["-cross-module-optimization"]),
+                .unsafeFlags(["-experimental-package-cmo", "-experimental-allow-non-resilient-access"]),
                 .enableUpcomingFeature("ExistentialAny"),
                 .enableUpcomingFeature("InternalImportsByDefault"),
             ]