diff --git a/Package.swift b/Package.swift
index 99f0db844..13fa2d385 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,7 @@
-// swift-tools-version: 5.9
+// swift-tools-version:5.9
+//
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+// Swift 5.9 is available from Xcode 15.0.
 
 import PackageDescription