diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 94ebc5e..a0f902b 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -13,9 +13,9 @@ concurrency:
 jobs:
   analyze:
     name: Analyze
-    runs-on: macos-14
+    runs-on: macos-15
     env:
-      DEVELOPER_DIR: "/Applications/Xcode_16.0.app/Contents/Developer"
+      DEVELOPER_DIR: "/Applications/Xcode_16.1.app/Contents/Developer"
     timeout-minutes: 120
     permissions:
       security-events: write
diff --git a/.github/workflows/deploy_docc.yml b/.github/workflows/deploy_docc.yml
index 3a0ea9f..88ae2bf 100644
--- a/.github/workflows/deploy_docc.yml
+++ b/.github/workflows/deploy_docc.yml
@@ -17,9 +17,9 @@ concurrency:
 
 jobs:
   build:
-    runs-on: macos-14
+    runs-on: macos-15
     env:
-      DEVELOPER_DIR: "/Applications/Xcode_16.0.app/Contents/Developer"
+      DEVELOPER_DIR: "/Applications/Xcode_16.1.app/Contents/Developer"
     steps:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
diff --git a/README.md b/README.md
index 4a8f51c..1873890 100644
--- a/README.md
+++ b/README.md
@@ -64,6 +64,6 @@ $ open InAppPurchaseViewer.xcworkspace
 ### Development Environment
 
 - macOS 15 Sequoia
-- Xcode 16.0
-- Swift 6.0
+- Xcode 16.1
+- Swift 6
 - Sandbox enabled