diff --git a/README.md b/README.md
index ac512a8..d359a57 100644
--- a/README.md
+++ b/README.md
@@ -434,7 +434,7 @@ npm run dev        # Starts server with --watch (auto-reload)
 ### Tests
 
 ```bash
-npm test           # 146+ tests across 9 suites
+npm test           # 162 tests across 9 suites
 ```
 
 Tests use Node.js built-in test runner with `--experimental-sqlite` for in-memory SQLite. No running server required.
diff --git a/package.json b/package.json
index 7fadc83..d07b314 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,9 @@
   "version": "0.5.0",
   "description": "Selbstgehosteter Familienplaner — Kalender, Aufgaben, Einkauf, Essensplan, Budget und mehr. Privat, offen, ohne Abo.",
   "main": "server/index.js",
+  "engines": {
+    "node": ">=22.0.0"
+  },
   "scripts": {
     "start": "node server/index.js",
     "dev": "node --watch server/index.js",
diff --git a/social-preview.png b/social-preview.png
new file mode 100644
index 0000000..d7e3883
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