diff --git a/.swift-version b/.swift-version
index a435f5a5..7849b73d 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-6.1
+6.3.3
diff --git a/Benchmarks/Package.swift b/Benchmarks/Package.swift
index 68efcc95..adcb9aab 100644
--- a/Benchmarks/Package.swift
+++ b/Benchmarks/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 5.8
+// swift-tools-version: 6.3.3
 
 import PackageDescription
 
diff --git a/Package.swift b/Package.swift
index afd2f630..4f1e02fd 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 6.1
+// swift-tools-version: 6.3.3
 import PackageDescription
 
 let package = Package(