diff --git a/Package.swift b/Package.swift
index 4f0fc49..70f3170 100644
--- a/Package.swift
+++ b/Package.swift
@@ -90,3 +90,11 @@ if ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] == nil {
         .package(path: "../swift-asn1"),
     ]
 }
+
+for target in package.targets {
+    if target.type != .plugin {
+        var settings = target.swiftSettings ?? []
+        settings.append(.enableUpcomingFeature("MemberImportVisibility"))
+        target.swiftSettings = settings
+    }
+}