diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5c1e7c1..a61313b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -3,15 +3,13 @@ name: CI
 on: [push, pull_request]
 
 env:
-  DEVELOPER_DIR: /Applications/Xcode_12.4.app
+  DEVELOPER_DIR: /Applications/Xcode_13.4.1.app
 
 jobs:
   test:
-
-    runs-on: macos-latest
-
+    runs-on: macos-12
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Xcode list
       run: ls /Applications | grep 'Xcode'
     - name: Test
diff --git a/Package.resolved b/Package.resolved
index 3c56c5b..b54c36d 100644
--- a/Package.resolved
+++ b/Package.resolved
@@ -6,8 +6,8 @@
         "repositoryURL": "https://github.com/jpsim/Yams.git",
         "state": {
           "branch": null,
-          "revision": "9ff1cc9327586db4e0c8f46f064b6a82ec1566fa",
-          "version": "4.0.6"
+          "revision": "01835dc202670b5bb90d07f3eae41867e9ed29f6",
+          "version": "5.0.1"
         }
       }
     ]
diff --git a/Package.swift b/Package.swift
index 059b8fd..12e3c7f 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.1
+// swift-tools-version:5.6
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
@@ -9,10 +9,10 @@ let package = Package(
         .executable(name: "SpellChecker", targets: ["SpellChecker"])
     ],
     dependencies: [
-        .package(url: "https://github.com/jpsim/Yams.git", from: "4.0.2")
+        .package(url: "https://github.com/jpsim/Yams.git", from: "5.0.1")
     ],
     targets: [
-        .target(
+        .executableTarget(
             name: "SpellChecker",
             dependencies: ["SpellCheckerCore", "Yams"]),
         .target(
diff --git a/README.md b/README.md
index 7d5d4bc..35125bc 100644
--- a/README.md
+++ b/README.md
@@ -8,9 +8,9 @@
 
 ## Recommended environment
 
-- Swift 5.1
-- Xcode 11.2.1
-- macOS 10.15
+- Swift 5.6+
+- Xcode 13.3+
+- macOS 12.3+
 
 ## Install