diff --git a/README.fr.md b/README.fr.md
index d2917f4..2e96ef4 100644
--- a/README.fr.md
+++ b/README.fr.md
@@ -5,6 +5,8 @@ elle peut démarrer automatiquement la journée et proposer sa clôture. Chaque
 commence là où la précédente s’est terminée. Les journées clôturées ont un
 récapitulatif concis, prêt à être recopié dans un registre papier.
 
+Version actuelle de l’application : **1.0.0**.
+
 Conçue pour l’extérieur : contraste élevé, grandes zones tactiles et utilisable
 avec des gants. Les données sont enregistrées localement dans IndexedDB. Une
 synchronisation facultative chiffrée de bout en bout les partage entre appareils
diff --git a/README.md b/README.md
index af830e7..d072720 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@ the app is open, it can start a workday automatically and prompt to close it. Ea
 task starts when the previous one ends. Closed days have concise summaries ready to
 copy into a paper logbook.
 
+Current application version: **1.0.0**.
+
 Designed for outdoor use: high contrast, large touch targets, and usable with gloves.
 Data is stored locally in IndexedDB. Optional end-to-end encrypted synchronization
 shares it between authorized devices without requiring an email address or password.
diff --git a/docker/Caddyfile b/docker/Caddyfile
index f03af1a..9143c4a 100644
--- a/docker/Caddyfile
+++ b/docker/Caddyfile
@@ -44,7 +44,7 @@ http://{$SITE_ADDRESS} {
 	# If a browser is allowed to serve sw.js from its own cache, a new build is
 	# never discovered and the in-app update prompt can never fire — the app would
 	# silently freeze on whatever version it first installed.
-	@volatile path / /index.html /sw.js /manifest.webmanifest
+	@volatile path / /index.html /sw.js /manifest.webmanifest /app-version.json
 	header @volatile Cache-Control "no-cache, must-revalidate"
 
 	# Content-hashed filenames; the name changes whenever the bytes do.
diff --git a/package-lock.json b/package-lock.json
index 940a485..1de2138 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "pardis",
-  "version": "0.8.0",
+  "version": "1.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "pardis",
-      "version": "0.8.0",
+      "version": "1.0.0",
       "dependencies": {
         "@hpke/core": "^1.9.0",
         "@zxing/browser": "^0.2.1",
diff --git a/package.json b/package.json
index 3b89e44..496105a 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "pardis",
   "private": true,
-  "version": "0.8.0",
+  "version": "1.0.0",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/src/App.svelte b/src/App.svelte
index ee25cc3..8f3c418 100644
--- a/src/App.svelte
+++ b/src/App.svelte
@@ -4,7 +4,7 @@
   import { loadBackupStatus } from './lib/backup-state.svelte.js';
   import { go, router } from './lib/router.svelte.js';
   import { loadSettings, settings } from './lib/settings.svelte.js';
-  import { needsRefresh, applyUpdate } from './lib/updates.svelte.js';
+  import { needsRefresh, availableVersion, applyUpdate } from './lib/updates.svelte.js';
   import Resume from './routes/Resume.svelte';
   import Settings from './routes/Settings.svelte';
   import Today from './routes/Today.svelte';
@@ -105,7 +105,7 @@
     <!-- Only offered while no day is running, so an update can never interrupt
          a day in progress. -->
     <div class="update">
-      <span>Mise à jour disponible</span>
+      <span>Mise à jour disponible{#if availableVersion.value} (v{availableVersion.value}){/if}</span>
       <button type="button" disabled={dayState.importing} onclick={applyUpdate}>Installer</button>
     </div>
   {/if}
diff --git a/src/lib/updates.svelte.js b/src/lib/updates.svelte.js
index 8e0f09d..cafee01 100644
--- a/src/lib/updates.svelte.js
+++ b/src/lib/updates.svelte.js
@@ -13,6 +13,19 @@ import { registerSW } from 'virtual:pwa-register';
 const CHECK_INTERVAL = 60 * 60 * 1000;
 
 export const needsRefresh = $state({ value: false });
+export const availableVersion = $state({ value: '' });
+
+async function loadAvailableVersion() {
+  availableVersion.value = '';
+  try {
+    const response = await fetch('/app-version.json', { cache: 'no-store' });
+    if (!response.ok) return;
+    const result = await response.json();
+    if (typeof result.version === 'string') availableVersion.value = result.version;
+  } catch {
+    // The update prompt remains useful if a proxy briefly makes version data unavailable.
+  }
+}
 
 /** @type {(reloadPage?: boolean) => Promise<void>} */
 let update = async () => {};
@@ -22,6 +35,7 @@ if (typeof window !== 'undefined') {
     immediate: true,
     onNeedRefresh() {
       needsRefresh.value = true;
+      void loadAvailableVersion();
     },
     onRegisteredSW(_url, registration) {
       if (!registration) return;
diff --git a/src/routes/About.svelte b/src/routes/About.svelte
index 437b6df..6ed92ab 100644
--- a/src/routes/About.svelte
+++ b/src/routes/About.svelte
@@ -10,6 +10,7 @@
     enregistre les journées, les tâches, les clients, les repas et les pauses,
     puis prépare un récapitulatif à consulter ou à copier.
   </p>
+  <p class="dim">Version 1.0.0</p>
   <p>L'application, son code source, et le service de synchronisation sont fournis gratuitement et
     sans aucune garantie.</p>
 
diff --git a/vite.config.js b/vite.config.js
index 8fb0b52..7057085 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -1,7 +1,21 @@
+import { readFileSync } from 'node:fs';
 import { svelte } from '@sveltejs/vite-plugin-svelte';
 import { defineConfig } from 'vite';
 import { VitePWA } from 'vite-plugin-pwa';
 
+const { version: appVersion } = JSON.parse(readFileSync(new URL('./package.json', import.meta.url), 'utf8'));
+
+const appVersionAsset = {
+  name: 'pardis-app-version',
+  generateBundle() {
+    this.emitFile({
+      type: 'asset',
+      fileName: 'app-version.json',
+      source: JSON.stringify({ version: appVersion }),
+    });
+  },
+};
+
 export default defineConfig({
   server: {
     host: '0.0.0.0',
@@ -9,6 +23,7 @@ export default defineConfig({
   },
   preview: { proxy: { '/api/sync': 'http://127.0.0.1:3001' } },
   plugins: [
+    appVersionAsset,
     svelte(),
     VitePWA({
       // Never `autoUpdate`: a worker swap mid-day reloads the page under the