diff --git a/AzooKeyCore/Package.swift b/AzooKeyCore/Package.swift
index 84ebd32a..51bbb3f5 100644
--- a/AzooKeyCore/Package.swift
+++ b/AzooKeyCore/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 5.8
+// swift-tools-version: 5.9
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription