diff --git a/src/errors/AppError.ts b/src/errors/AppError.ts
index f45c974..70b3ba1 100644
--- a/src/errors/AppError.ts
+++ b/src/errors/AppError.ts
@@ -25,4 +25,5 @@ export const Errors = {
 
   //Auth errors
   UNAUTHORIZED: new AppError('UNAUTHORIZED', 401, 'Non authentifié'),
+  USER_NOT_FOUND: new AppError('USER_NOT_FOUND', 404, 'Utilisateur introuvable'),
 }
\ No newline at end of file
diff --git a/src/middleware/verifyAuth.ts b/src/middleware/verifyAuth.ts
index df2a836..9606b07 100644
--- a/src/middleware/verifyAuth.ts
+++ b/src/middleware/verifyAuth.ts
@@ -4,13 +4,16 @@ import { Errors } from '../errors/AppError.js'
 
 export async function verifyAuth(request: FastifyRequest, reply: FastifyReply) {
   const token = request.cookies['authToken']
+  console.log('token reçu:', token)
 
   if (!token) throw Errors.UNAUTHORIZED
 
   try {
     const payload = await verifyAuthToken(request.server, request.server.prisma, token)
+    console.log('payload:', payload)
     request.user = payload
-  } catch {
+  } catch (e) {
+    console.log('erreur:', e)
     throw Errors.UNAUTHORIZED
   }
 }
\ No newline at end of file
diff --git a/src/routes/auth.ts b/src/routes/auth.ts
index f1518a9..b355a0b 100644
--- a/src/routes/auth.ts
+++ b/src/routes/auth.ts
@@ -19,6 +19,7 @@ export default async function authRoutes(fastify: FastifyInstance) {
       httpOnly: true,
       sameSite: 'strict',
       maxAge: 60 * 60 * 24 * 7,
+      path: '/',
     })
 
     return reply.status(201).send({ user })
@@ -34,6 +35,7 @@ export default async function authRoutes(fastify: FastifyInstance) {
       httpOnly: true,
       sameSite: 'strict',
       maxAge: 60 * 60 * 24 * 7,
+      path: '/',
     })
 
     return reply.status(200).send({ user })
diff --git a/src/routes/users.ts b/src/routes/users.ts
index 7aa9bc5..f4bb5af 100644
--- a/src/routes/users.ts
+++ b/src/routes/users.ts
@@ -1,6 +1,10 @@
 import { FastifyInstance } from 'fastify'
 import { Errors } from '../errors/AppError'
 import { confirmEmail } from '../services/user.service'
+import { verifyAuth } from '../middleware/verifyAuth'
+import { UpdateDisplayNameSchema } from '../schemas/user.schema.js'
+import { updateDisplayName } from '../services/user.service.js'
+
 
 export default async function userRoutes(fastify: FastifyInstance) {
   fastify.get('/users', async (request, reply) => {
@@ -27,6 +31,12 @@ export default async function userRoutes(fastify: FastifyInstance) {
   }
 
   const result = await confirmEmail(fastify.prisma, token)
-  return reply.status(200).send(result)
-})
+    return reply.status(200).send(result)
+  })
+
+  fastify.patch('/user/display-name', { preHandler: verifyAuth }, async (request, reply) => {
+    const body = UpdateDisplayNameSchema.parse(request.body)
+    const user = await updateDisplayName(fastify.prisma, request.user.userId, body)
+    return reply.status(200).send({ user })
+  })
 }
\ No newline at end of file
diff --git a/src/schemas/user.schema.ts b/src/schemas/user.schema.ts
new file mode 100644
index 0000000..db10236
--- /dev/null
+++ b/src/schemas/user.schema.ts
@@ -0,0 +1,7 @@
+import { z } from 'zod'
+
+export const UpdateDisplayNameSchema = z.object({
+  displayName: z.string().min(2).max(32),
+})
+
+export type UpdateDisplayNameInput = z.infer<typeof UpdateDisplayNameSchema>
\ No newline at end of file
diff --git a/src/services/user.service.ts b/src/services/user.service.ts
index f371b3e..fa22dcc 100644
--- a/src/services/user.service.ts
+++ b/src/services/user.service.ts
@@ -1,5 +1,6 @@
 import { PrismaClient } from '../generated/prisma/client.js'
 import { Errors } from '../errors/AppError.js'
+import { UpdateDisplayNameInput } from '../schemas/user.schema.js'
 
 export async function confirmEmail(prisma: PrismaClient, token: string) {
   const actionToken = await prisma.actionToken.findUnique({
@@ -34,4 +35,26 @@ export async function confirmEmail(prisma: PrismaClient, token: string) {
   ])
 
   return { success: true }
+}
+
+export async function updateDisplayName(
+  prisma: PrismaClient,
+  userId: string,
+  input: UpdateDisplayNameInput
+  ) {
+  const user = await prisma.user.findUnique({ where: { id: userId } })
+  if (!user) throw Errors.USER_NOT_FOUND
+
+  return await prisma.user.update({
+    where: { id: userId },
+    data: { displayName: input.displayName },
+    select: {
+      id: true,
+      email: true,
+      displayName: true,
+      avatar: true,
+      isConfirmed: true,
+      createdAt: true,
+    },
+  })
 }
\ No newline at end of file
diff --git a/src/types/fastify.d.ts b/src/types/fastify.d.ts
index 6e92df4..c1dddae 100644
--- a/src/types/fastify.d.ts
+++ b/src/types/fastify.d.ts
@@ -11,4 +11,17 @@ declare module 'fastify' {
       tokenVersion: number
     }
   }
+}
+
+declare module '@fastify/jwt' {
+  interface FastifyJWT {
+    payload: {
+      userId: string
+      tokenVersion: number
+    }
+    user: {
+      userId: string
+      tokenVersion: number
+    }
+  }
 }
\ No newline at end of file