diff --git a/app/page.js b/app/page.js
index c9897d1..aa11a75 100644
--- a/app/page.js
+++ b/app/page.js
@@ -1,4 +1,5 @@
 import {createDirectus, rest, readItems} from '@directus/sdk'
+import {unstable_cache as nextCache} from 'next/cache'
 import Container from '@mui/material/Container'
 import Box from '@mui/material/Box'
 import Typography from '@mui/material/Typography'
@@ -19,7 +20,7 @@ const navButton = {
   icon: <AdminPanelSettingsIcon fontSize='large' />
 }
 
-async function getData() {
+async function fetchConstitution() {
   if (!apiUrl) {
     throw new Error('DIRECTUS_API_URL is required')
   }
@@ -58,6 +59,14 @@ async function getData() {
   }
 }
 
+// Mise en cache des données constitution — revalidation toutes les 5 minutes.
+// Le tag 'constitution' permet une invalidation à la demande via revalidateTag().
+const getData = nextCache(
+  fetchConstitution,
+  ['constitution-data'],
+  {revalidate: 300, tags: ['constitution']}
+)
+
 export default async function Page() {
   const session = await auth()
   const {titres, articles} = await getData()
diff --git a/tasks/todo.md b/tasks/todo.md
index b3c93bf..29de9b5 100644
--- a/tasks/todo.md
+++ b/tasks/todo.md
@@ -19,7 +19,7 @@
 
 ## Améliorations moyennes (P3)
 
-- [ ] ISR page d'accueil (`revalidate`)
+- [x] ISR page d'accueil (`revalidate`)
 - [ ] Dockerisation frontend (`output: standalone`)
 - [ ] Audit accessibilité WCAG 2.1
 - [ ] Responsive mobile dashboard