diff --git a/src/core/i18n.ts b/src/core/i18n.ts
index ee94972..21339a8 100644
--- a/src/core/i18n.ts
+++ b/src/core/i18n.ts
@@ -12,6 +12,10 @@ export interface Translations {
   error: string;
   notAvailable: string;
 
+  // App update
+  updateAvailable: string;
+  updateReload: string;
+
   // Navigation
   nav: {
     calendar: string;
@@ -548,6 +552,9 @@ const translations: Record<LanguageCode, Translations> = {
     error: 'Error',
     notAvailable: 'Not available',
 
+    updateAvailable: 'New version available',
+    updateReload: 'Update',
+
     nav: {
       calendar: '📅 Calendar',
       service: '📖 Service',
@@ -1116,6 +1123,9 @@ const translations: Record<LanguageCode, Translations> = {
     error: 'Ошибка',
     notAvailable: 'Недоступно',
 
+    updateAvailable: 'Достꙋ́пна новаѧ вєрсі́ѧ',
+    updateReload: 'Обнови́ти',
+
     nav: {
       calendar: '📅 Календарь',
       service: '📖 Устав',
@@ -1684,6 +1694,9 @@ const translations: Record<LanguageCode, Translations> = {
     error: 'Ошибка',
     notAvailable: 'Недоступно',
 
+    updateAvailable: 'Доступна новая версия',
+    updateReload: 'Обновить',
+
     nav: {
       calendar: '📅 Календарь',
       service: '📖 Уставъ',
diff --git a/src/main.ts b/src/main.ts
index 0820842..1df3a6a 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,5 +1,32 @@
 import './styles/main.css';
+import { registerSW } from 'virtual:pwa-register';
 import { App } from './ui/app';
+import { getTranslations, type LanguageCode } from './core/i18n';
+import { loadSettings } from './ui/settings-view';
+
+const updateSW = registerSW({
+  immediate: true,
+  onNeedRefresh: () => showUpdateToast(),
+});
+
+function showUpdateToast() {
+  if (document.getElementById('pwa-update-toast')) return;
+  const t = getTranslations(loadSettings().language as LanguageCode);
+  const toast = document.createElement('div');
+  toast.id = 'pwa-update-toast';
+  toast.className = 'fixed bottom-4 left-1/2 -translate-x-1/2 z-[60] bg-surface border border-gold/40 rounded-lg shadow-xl px-4 py-3 flex items-center gap-3 max-w-[calc(100vw-2rem)]';
+  toast.innerHTML = `
+    <span class="text-sm text-navy whitespace-nowrap">${t.updateAvailable}</span>
+    <button id="pwa-update-btn" class="bg-gold text-navy rounded px-3 py-1 text-sm font-bold hover:bg-gold-dark transition-colors whitespace-nowrap">${t.updateReload}</button>
+    <button id="pwa-update-dismiss" class="text-navy-light hover:text-navy text-lg leading-none px-1" aria-label="✕">&times;</button>
+  `;
+  document.body.appendChild(toast);
+  toast.querySelector('#pwa-update-btn')?.addEventListener('click', () => {
+    (toast.querySelector('#pwa-update-btn') as HTMLButtonElement).disabled = true;
+    updateSW(true);
+  });
+  toast.querySelector('#pwa-update-dismiss')?.addEventListener('click', () => toast.remove());
+}
 
 const app = new App(document.getElementById('app')!);
 app.init();
diff --git a/src/ui/settings-view.ts b/src/ui/settings-view.ts
index 8f47687..61843b9 100644
--- a/src/ui/settings-view.ts
+++ b/src/ui/settings-view.ts
@@ -319,6 +319,7 @@ export class SettingsView {
               ${t.settings.aboutLicense}
             </a>
           </p>
+          <p class="text-[10px] text-navy-light mt-2 opacity-70">build ${__BUILD_DATE__}</p>
         </div>
       </div>
     `;
diff --git a/src/vite-env.d.ts b/src/vite-env.d.ts
index 11f02fe..9860a3a 100644
--- a/src/vite-env.d.ts
+++ b/src/vite-env.d.ts
@@ -1 +1,4 @@
 /// <reference types="vite/client" />
+/// <reference types="vite-plugin-pwa/client" />
+
+declare const __BUILD_DATE__: string;
diff --git a/vite.config.ts b/vite.config.ts
index 1a5afbc..6f593f6 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -6,11 +6,10 @@ import { VitePWA } from 'vite-plugin-pwa';
 export default defineConfig({
   plugins: [
     tailwindcss(),
-    VitePWA({
-      registerType: 'autoUpdate',
+    VitePWA({      registerType: 'prompt',
       workbox: {
-        skipWaiting: true,
-        clientsClaim: true,
+        skipWaiting: false,
+        clientsClaim: false,
         globPatterns: ['**/*.{js,css,html,woff,png}'],
         globIgnores: ['**/data/**'],
         maximumFileSizeToCacheInBytes: 20 * 1024 * 1024,
@@ -66,5 +65,8 @@ export default defineConfig({
     outDir: 'dist',
     sourcemap: true,
   },
+  define: {
+    __BUILD_DATE__: JSON.stringify(new Date().toISOString().slice(0, 10)),
+  },
   publicDir: 'static',
 });
\ No newline at end of file