diff --git a/.gitea/workflows/ci.yaml b/.gitea/workflows/ci.yaml
index 2786a46..7427d22 100644
--- a/.gitea/workflows/ci.yaml
+++ b/.gitea/workflows/ci.yaml
@@ -10,8 +10,6 @@ on:
 jobs:
   test:
     runs-on: [self-hosted, macos-latest]
-    strategy:
-      matrix: { node-version: [18, 20] }
     env:
       NODE_OPTIONS: "--max_old_space_size=8192 --max_semi_space_size=128"
       CI: true
@@ -28,9 +26,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-          cache: npm
+        if: ${{ github.server_url == 'https://github.com' }}
+        with: { node-version: 20, cache: npm }
+      - uses: actions/setup-node@v4
+        if: ${{ github.server_url != 'https://github.com' || !github.server_url }}
+        with: { node-version: 20 }
       - run: npm ci
       - name: Show system info
         run: |
diff --git a/README.md b/README.md
index 284ef18..9f23e61 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,11 @@
 
 A Next.js application for community decision-making and governance documentation.
 
+## 📋 Requirements
+
+- **Node.js**: 20.0.0 or higher (LTS recommended)
+- **npm**: 10.0.0 or higher
+
 ## 🚀 Getting Started
 
 Run the development server:
@@ -194,10 +199,11 @@ community-rule/
 
 ## 🔧 Technology Stack
 
-- **Framework**: Next.js 15 + React 19
+- **Framework**: Next.js 16 + React 19
+- **Runtime**: Node.js 20+ (LTS)
 - **Styling**: Tailwind CSS 4
 - **Testing**: Vitest + Playwright + Lighthouse CI
-- **Documentation**: Storybook 9
+- **Documentation**: Storybook 10
 - **CI/CD**: Gitea Actions
 - **Hosting**: Gitea (Git hosting)
 
diff --git a/package.json b/package.json
index 1d2c323..79434ce 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,9 @@
   "name": "community-rule",
   "version": "0.1.0",
   "private": true,
+  "engines": {
+    "node": ">=20.0.0"
+  },
   "scripts": {
     "dev": "next dev --turbopack",
     "build": "next build",