diff --git a/cryptide_project/src/Pages/Profile.tsx b/cryptide_project/src/Pages/Profile.tsx
index f8e2be4..e0efd2e 100644
--- a/cryptide_project/src/Pages/Profile.tsx
+++ b/cryptide_project/src/Pages/Profile.tsx
@@ -7,6 +7,7 @@ import { delay, update } from 'lodash';
 import { socket } from '../SocketConfig';
 import AuthService from '../services/AuthService';
 
+
 /* Style */
 import './Profile.css'
 import Edit from "../res/icon/edit-pen.png"
@@ -45,7 +46,8 @@ const Profile = () => {
   const onUsernameChange = (newUsername) => {
     console.log("nouveau pseudo : " + newUsername)
     if(user?.pseudo != null){
-      user.pseudo = newUsername;
+      SessionService.UpdatePseudo(user.pseudo, newUsername)
+      //user.pseudo = newUsername;
     }
   }
 
diff --git a/cryptide_project/src/server/controllers/SessionController.js b/cryptide_project/src/server/controllers/SessionController.js
index 3c5350e..f536a0b 100644
--- a/cryptide_project/src/server/controllers/SessionController.js
+++ b/cryptide_project/src/server/controllers/SessionController.js
@@ -27,6 +27,35 @@ class SessionController {
             await db.disconnect();
         }
     }
+
+    static async UpdatePseudo(req, res){
+        const db = new DatabaseService();
+
+        try{
+            await db.connect();
+
+            const user = db.getUserByPseudo(req.body.pseudo);
+            if (!user) {
+                res.status(200).json({ error: "true", message: 'User not found' });
+                return;
+            }
+
+            await db.updatePseudo(user.idUser, req.body.newPseudo); //* update
+
+            const updatedUser = db.getUserByPseudo(req.body.newPseudo);
+
+            req.session.user.pseudo = updatedUser.pseudo;
+            
+            res.status(200).json({ user: req.session.user }); //verif rep
+        }
+        catch(error){
+            console.error(error);
+            res.status(500).json({ error: 'Erreur lors de la modification du pseudo de l\'utilisateur.' });
+        }
+        finally{
+            await db.disconnect();
+        }
+    }
 }
 
 module.exports = SessionController;
\ No newline at end of file
diff --git a/cryptide_project/src/server/db/socialgraph.db b/cryptide_project/src/server/db/socialgraph.db
index be47d2d..35ebe49 100644
Binary files a/cryptide_project/src/server/db/socialgraph.db and b/cryptide_project/src/server/db/socialgraph.db differ
diff --git a/cryptide_project/src/server/routes/AuthRoutes.js b/cryptide_project/src/server/routes/AuthRoutes.js
index 37458bb..a0da069 100644
--- a/cryptide_project/src/server/routes/AuthRoutes.js
+++ b/cryptide_project/src/server/routes/AuthRoutes.js
@@ -11,5 +11,6 @@ router.delete('/auth/delAccount', AuthController.delAccount)
 
 // Routes pour les sessions
 router.get('/session', SessionController.getUserInformation);
+router.put('/session/updatePseudo', SessionController.UpdatePseudo);
 
 module.exports = router;
diff --git a/cryptide_project/src/server/services/DatabaseService.js b/cryptide_project/src/server/services/DatabaseService.js
index 1849a97..3888a87 100644
--- a/cryptide_project/src/server/services/DatabaseService.js
+++ b/cryptide_project/src/server/services/DatabaseService.js
@@ -172,6 +172,19 @@ class DatabaseService {
             });
         });
     }
+
+    async updatePseudo(userId, newPseudo){
+        return new Promise((resolve, reject) => {
+            this.client.run('UPDATE users SET pseudo = ? WHERE idUser = ?', newPseudo, userId, (err, result) => {
+                if(err){
+                    reject(err);
+                }
+                else{
+                    resolve(result);
+                }
+            });
+        });
+    }
 }
 
 module.exports = DatabaseService;
\ No newline at end of file
diff --git a/cryptide_project/src/services/SessionService.tsx b/cryptide_project/src/services/SessionService.tsx
index 46340ab..49cf8e9 100644
--- a/cryptide_project/src/services/SessionService.tsx
+++ b/cryptide_project/src/services/SessionService.tsx
@@ -23,7 +23,33 @@ class SessionService {
             throw error;
         }
     }
+
+    static async UpdatePseudo(pseudo : string, newPseudo : string) {
+        try {
+            const response = await fetch(ADRESSE_DBSERVER + '/session/updatePseudo', {
+                method: 'PUT',
+                headers: {
+                    'Content-Type': 'application/json',
+                },
+                body: JSON.stringify({
+                    pseudo,
+                    newPseudo
+                }),
+                credentials: 'include',
+            });
+    
+            if (response.ok) {
+                const result = await response.json();
+                return result;
+            } else {
+                const errorResponse = await response.json();
+                throw new Error(errorResponse.error);
+            }
+        } catch (error) {
+            console.error(error);
+            throw error;
+        }
+    }
 }
-  
-  export default SessionService;
-  
\ No newline at end of file
+
+export default SessionService;