diff --git a/backend/main.py b/backend/main.py
index 673fbc2..3c6da93 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -12,6 +12,7 @@ from .schemas import AdminCreate, LoginRequest, ProjectCreate, ProjectResponse,
 from .models import User, Project, Message, SystemSettings
 from .orchestrator import run_orchestrator, sync_providers_models
 from .models import User, Project, Message, SystemSettings, AIModel
+from .schemas import AdminCreate, LoginRequest, ProjectCreate, ProjectResponse, ProjectRename, MessageCreate, MessageResponse, PasswordChangeS
 
 # Création des tables dans la base de données
 Base.metadata.create_all(bind=engine)
@@ -94,6 +95,19 @@ def dashboard(request: Request):
     frontend_path = os.path.join(os.getcwd(), "frontend", "dashboard.html")
     return FileResponse(frontend_path)
 
+@app.put("/api/users/me/password")
+def change_password(passwords: PasswordChange, db: Session = Depends(get_db), current_user: User = Depends(get_current_user)):
+    """Permet à l'utilisateur connecté de modifier son propre mot de passe."""
+    if not verify_password(passwords.old_password, current_user.hashed_password):
+        raise HTTPException(status_code=400, detail="L'ancien mot de passe est incorrect.")
+    
+    if len(passwords.new_password) < 8:
+        raise HTTPException(status_code=400, detail="Le nouveau mot de passe doit contenir au moins 8 caractères.")
+        
+    current_user.hashed_password = get_password_hash(passwords.new_password)
+    db.commit()
+    return {"message": "Mot de passe mis à jour avec succès."}
+
 # --- GESTION DES PROJETS ---
 
 def get_current_user(request: Request, db: Session = Depends(get_db)):
diff --git a/backend/schemas.py b/backend/schemas.py
index 9dc5b66..849066c 100644
--- a/backend/schemas.py
+++ b/backend/schemas.py
@@ -56,4 +56,8 @@ class MessageResponse(MessageBase):
     project_id: int
 
 class ProjectRename(BaseModel):
-    title: str
\ No newline at end of file
+    title: str
+
+class PasswordChange(BaseModel):
+    old_password: str
+    new_password: str
\ No newline at end of file
diff --git a/frontend/dashboard.html b/frontend/dashboard.html
index 3c5afde..759e948 100644
--- a/frontend/dashboard.html
+++ b/frontend/dashboard.html
@@ -24,6 +24,39 @@
 <body class="h-screen flex overflow-hidden">
 
 <div id="app" class="flex w-full h-full relative bg-aethas-dark">
+    
+    <!-- MODAL PARAMÈTRES -->
+    <div v-if="isSettingsModalOpen" class="fixed inset-0 bg-black/80 z-[100] flex items-center justify-center p-4">
+        <div class="bg-aethas-panel border border-gray-600 rounded-2xl w-full max-w-md overflow-hidden shadow-[0_0_30px_rgba(0,0,0,0.7)]">
+            <div class="p-4 border-b border-gray-700 flex justify-between items-center bg-gray-800/50">
+                <h2 class="text-lg font-bold text-white flex items-center gap-2"><i data-lucide="settings" class="w-5 h-5 text-aethas-cyan"></i> Paramètres</h2>
+                <button @click="closeSettings" class="text-gray-400 hover:text-white"><i data-lucide="x" class="w-5 h-5"></i></button>
+            </div>
+            <div class="p-6 space-y-4">
+                <h3 class="text-sm font-semibold text-aethas-cyan uppercase tracking-wider mb-2">Sécurité du compte</h3>
+                <div v-if="settingsMessage" :class="['p-3 rounded text-sm text-center', settingsMessage.includes('succès') ? 'bg-green-900/50 text-green-200 border border-green-500' : 'bg-red-900/50 text-red-200 border border-red-500']">{{ settingsMessage }}</div>
+                
+                <div>
+                    <label class="block text-sm text-gray-300 mb-1">Ancien mot de passe</label>
+                    <input v-model="passForm.old" type="password" class="w-full bg-aethas-dark border border-gray-600 rounded-lg px-4 py-2 focus:border-aethas-cyan focus:outline-none" placeholder="••••••••">
+                </div>
+                <div>
+                    <label class="block text-sm text-gray-300 mb-1">Nouveau mot de passe</label>
+                    <input v-model="passForm.new" type="password" class="w-full bg-aethas-dark border border-gray-600 rounded-lg px-4 py-2 focus:border-aethas-cyan focus:outline-none" placeholder="8 caractères minimum">
+                </div>
+                <div>
+                    <label class="block text-sm text-gray-300 mb-1">Confirmer le mot de passe</label>
+                    <input v-model="passForm.confirm" type="password" class="w-full bg-aethas-dark border border-gray-600 rounded-lg px-4 py-2 focus:border-aethas-cyan focus:outline-none" placeholder="••••••••">
+                </div>
+                
+                <button @click="changePassword" :disabled="isSavingSettings" class="w-full mt-4 bg-gray-700 hover:bg-gray-600 text-white font-semibold py-2.5 px-4 rounded-lg transition-colors border border-gray-500 disabled:opacity-50">
+                    <span v-if="isSavingSettings">Mise à jour...</span>
+                    <span v-else>Modifier le mot de passe</span>
+                </button>
+            </div>
+        </div>
+    </div>
+
     <div v-if="isSidebarOpen" @click="toggleSidebar" class="md:hidden fixed inset-0 bg-black/60 z-40 transition-opacity"></div>
 
     <div :class="['transition-all duration-300 flex-shrink-0 relative z-50', isSidebarOpen ? 'w-72' : 'w-0']">
@@ -84,7 +117,7 @@
                     <div class="w-8 h-8 rounded-full bg-gradient-to-tr from-aethas-cyan to-aethas-purple flex items-center justify-center text-sm font-bold shadow-md">{{ username.charAt(0).toUpperCase() }}</div>
                     <span class="text-sm font-medium">{{ username }}</span>
                 </div>
-                <button class="text-gray-400 hover:text-white transition-colors" title="Paramètres">
+                <button @click="openSettings" class="text-gray-400 hover:text-white transition-colors" title="Paramètres">
                     <i data-lucide="settings" class="w-5 h-5"></i>
                 </button>
             </div>
@@ -157,7 +190,7 @@
 </div>
 
 <script>
-    const { createApp, ref, onMounted, nextTick, computed } = Vue;
+    const { createApp, ref, reactive, onMounted, nextTick, computed } = Vue;
 
     createApp({
         setup() {
@@ -171,6 +204,11 @@
             const isLoading = ref(false);
             const isAiThinking = ref(false);
 
+            const isSettingsModalOpen = ref(false);
+            const isSavingSettings = ref(false);
+            const settingsMessage = ref("");
+            const passForm = reactive({ old: '', new: '', confirm: '' });
+
             const pinnedProjects = computed(() => projects.value.filter(p => p.is_pinned));
             const recentProjects = computed(() => projects.value.filter(p => !p.is_pinned));
 
@@ -188,6 +226,51 @@
                 });
             };
 
+            const openSettings = () => {
+                isSettingsModalOpen.value = true;
+                settingsMessage.value = "";
+                passForm.old = ''; passForm.new = ''; passForm.confirm = '';
+                nextTick(() => lucide.createIcons());
+            };
+            
+            const closeSettings = () => {
+                isSettingsModalOpen.value = false;
+            };
+
+            const changePassword = async () => {
+                settingsMessage.value = "";
+                if (passForm.new !== passForm.confirm) {
+                    settingsMessage.value = "Les nouveaux mots de passe ne correspondent pas.";
+                    return;
+                }
+                if (passForm.new.length < 8) {
+                    settingsMessage.value = "Le mot de passe doit faire au moins 8 caractères.";
+                    return;
+                }
+
+                isSavingSettings.value = true;
+                try {
+                    const response = await fetch('/api/users/me/password', {
+                        method: 'PUT',
+                        headers: { 'Content-Type': 'application/json' },
+                        body: JSON.stringify({ old_password: passForm.old, new_password: passForm.new })
+                    });
+                    const data = await response.json();
+                    
+                    if (response.ok) {
+                        settingsMessage.value = data.message;
+                        passForm.old = ''; passForm.new = ''; passForm.confirm = '';
+                        setTimeout(() => closeSettings(), 2000);
+                    } else {
+                        settingsMessage.value = data.detail;
+                    }
+                } catch (error) {
+                    settingsMessage.value = "Erreur de connexion au serveur.";
+                } finally {
+                    isSavingSettings.value = false;
+                }
+            };
+
             const fetchProjects = async () => {
                 try {
                     const response = await fetch('/api/projects');
@@ -317,7 +400,8 @@
             return { 
                 username, isSidebarOpen, toggleSidebar, prompt, autoResize, promptTextarea, 
                 projects, pinnedProjects, recentProjects, activeProject, messages, isAiThinking,
-                createNewProject, selectProject, renameProject, sendMessage, isLoading, togglePin, deleteProject 
+                createNewProject, selectProject, renameProject, sendMessage, isLoading, togglePin, deleteProject,
+                isSettingsModalOpen, openSettings, closeSettings, passForm, settingsMessage, isSavingSettings, changePassword
             };
         }
     }).mount('#app');