diff --git a/app/api/auth/[...nextauth]/options.js b/app/api/auth/[...nextauth]/options.js
index 1352d41..6b1add5 100644
--- a/app/api/auth/[...nextauth]/options.js
+++ b/app/api/auth/[...nextauth]/options.js
@@ -1,3 +1,4 @@
+/* eslint-disable new-cap */
 import CredentialsProvider from 'next-auth/providers/credentials'
 import {readMe, withToken} from '@directus/sdk'
 import {directusClient} from '@/lib/directus.js'
@@ -5,9 +6,39 @@ import {directusClient} from '@/lib/directus.js'
 const apiUrl = process.env.DIRECTUS_API_URL
 const nextauthSecret = process.env.NEXTAUTH_SECRET
 
+// On rafraîchit 60s avant l'échéance réelle pour éviter les races
+const REFRESH_MARGIN_MS = 60 * 1000
+
+/**
+ * Appelle l'endpoint Directus /auth/refresh et retourne les nouveaux tokens.
+ * Lève une erreur si le refresh échoue (refresh_token expiré ou révoqué).
+ *
+ * @param {string} refreshToken
+ * @returns {Promise<{accessToken: string, refreshToken: string, accessTokenExpires: number}>}
+ */
+async function refreshDirectusToken(refreshToken) {
+  const res = await fetch(`${apiUrl}/auth/refresh`, {
+    method: 'POST',
+    headers: {'Content-Type': 'application/json'},
+    body: JSON.stringify({refresh_token: refreshToken, mode: 'json'}),
+  })
+
+  if (!res.ok) {
+    throw new Error(`Directus refresh failed with status ${res.status}`)
+  }
+
+  const {data} = await res.json()
+
+  return {
+    accessToken: data.access_token,
+    refreshToken: data.refresh_token,
+    accessTokenExpires: Date.now() + (data.expires ?? 900_000) - REFRESH_MARGIN_MS,
+  }
+}
+
 export const options = {
   providers: [
-    CredentialsProvider({ // eslint-disable-line new-cap
+    CredentialsProvider({
       name: 'Credentials',
       credentials: {
         email: {},
@@ -36,18 +67,13 @@ export const options = {
     signIn: '/login'
   },
   callbacks: {
-    async jwt({
-      token,
-      user,
-      account
-    }) {
+    async jwt({token, user, account}) {
+      // Connexion initiale : enrichissement du token avec les données Directus
       if (account && user) {
         const userData = await directusClient.request(
           withToken(
             user.data.access_token,
-            readMe({
-              fields: ['*']
-            })
+            readMe({fields: ['*']})
           )
         )
 
@@ -55,11 +81,24 @@ export const options = {
           ...token,
           accessToken: user.data.access_token,
           refreshToken: user.data.refresh_token,
-          user: userData
+          accessTokenExpires: Date.now() + (user.data.expires ?? 900_000) - REFRESH_MARGIN_MS,
+          user: userData,
         }
       }
 
-      return token
+      // Token encore valide : on le retourne sans modification
+      if (Date.now() < token.accessTokenExpires) {
+        return token
+      }
+
+      // Token expiré : tentative de rafraîchissement silencieux
+      try {
+        const refreshed = await refreshDirectusToken(token.refreshToken)
+        return {...token, ...refreshed}
+      } catch (refreshError) {
+        console.error('Refresh token Directus échoué :', refreshError.message)
+        return {...token, error: 'RefreshAccessTokenError'}
+      }
     },
     async session({session, token}) {
       session.user.userId = token.user.id
@@ -69,6 +108,7 @@ export const options = {
       session.user.token = token.user.token
       session.user.email = token.user.email
       session.user.password = token.user.password
+      session.error = token.error
       return session
     }
   }
diff --git a/tasks/todo.md b/tasks/todo.md
index bbdd5d6..d1545c8 100644
--- a/tasks/todo.md
+++ b/tasks/todo.md
@@ -12,8 +12,8 @@
 
 - [x] **Headers CSP** — `next.config.mjs` (renommé depuis .js) avec CSP + 4 headers sécurité
 - [x] **Tests unitaires** — Vitest sur `lib/format.js`, `lib/version-utils.js`, `lib/rate-limit.js`
-- [ ] **Tests extensions Directus** — mocks VersionsService
-- [ ] **Refresh token explicite** — callback `jwt` dans NextAuth options
+- [x] **Tests extensions Directus** — mocks VersionsService
+- [x] **Refresh token explicite** — callback `jwt` dans NextAuth options
 - [ ] **Pipeline CI** — GitHub Actions (lint + test + build)
 - [ ] **Sentry** — tracking erreurs frontend + API routes