diff --git a/Package.swift b/Package.swift
index d2146603c..dbac4e600 100644
--- a/Package.swift
+++ b/Package.swift
@@ -177,5 +177,6 @@ let package = Package(
                 .process("Resources")
             ]
         )
-    ]
+    ],
+    swiftLanguageModes: [.v5]
 )