diff --git a/cktap-swift/Package.swift b/cktap-swift/Package.swift
index 2e1b6b2..3a74f4e 100644
--- a/cktap-swift/Package.swift
+++ b/cktap-swift/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.5
+// swift-tools-version:6.0
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription