diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b266824..7ec7802 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,11 +8,13 @@ on:
 
 jobs:
   main:
-    runs-on: macos-12
+    runs-on: macos-13
     steps:
-      - uses: swift-actions/setup-swift@v1.19.0
+      - name: Select Xcode version
+        run: sudo xcode-select -s '/Applications/Xcode_15.0.1.app/Contents/Developer'
+      - uses: swift-actions/setup-swift@v1
         with:
-          swift-version: "5.7.0"
+          swift-version: "5.9.0"
       - uses: actions/checkout@v3
       - uses: actions/cache@v3
         with:
diff --git a/Package.swift b/Package.swift
index 6027988..0bed806 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 5.7
+// swift-tools-version: 5.9
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription