diff --git a/routes/calendar.routes.js b/routes/calendar.routes.js
index 710616c..4a91527 100644
--- a/routes/calendar.routes.js
+++ b/routes/calendar.routes.js
@@ -853,7 +853,7 @@ router.put('/events/:id', authenticateToken, async (req, res) => {
       endTimeUTC,
       location || null,
       response.data.htmlLink || null,
-      isAllDay ? 1 : 0,
+      isAllDay, // BOOLEAN instead of 0/1
       req.params.id
     ]);
 
diff --git a/routes/notes.routes.js b/routes/notes.routes.js
index f78dbc7..941a2f3 100644
--- a/routes/notes.routes.js
+++ b/routes/notes.routes.js
@@ -45,7 +45,7 @@ router.use(authenticateToken);
 router.get('/', async (req, res) => {
   try {
     const showArchived = req.query.archived === 'true';
-    const archivedFilter = showArchived ? 1 : 0;
+    const archivedFilter = showArchived; // BOOLEAN instead of 0/1
 
     const notes = await getAll(`
       SELECT
@@ -274,7 +274,7 @@ router.put('/:id/archive', async (req, res) => {
 
     await runQuery(
       'UPDATE notes SET archived = $1, updated_at = CURRENT_TIMESTAMP WHERE id = $2',
-      [archived ? 1 : 0, req.params.id]
+      [archived, req.params.id] // BOOLEAN instead of 0/1
     );
 
     logger.info(`Note ${archived ? 'archivée' : 'désarchivée'}: ${req.params.id}`);
@@ -488,7 +488,7 @@ router.put('/todos/:todoId',
       if (completed !== undefined) {
         paramCount++;
         updates.push(`completed = $${paramCount}`);
-        params.push(completed ? 1 : 0);
+        params.push(completed); // BOOLEAN instead of 0/1
       }
       if (position !== undefined) {
         paramCount++;
@@ -972,7 +972,7 @@ router.patch('/:id/priority', async (req, res) => {
       return res.status(404).json({ error: 'Note non trouvée' });
     }
 
-    await runQuery('UPDATE notes SET priority = $1, updated_at = CURRENT_TIMESTAMP WHERE id = $2', [priority ? 1 : 0, req.params.id]);
+    await runQuery('UPDATE notes SET priority = $1, updated_at = CURRENT_TIMESTAMP WHERE id = $2', [priority, req.params.id]); // BOOLEAN instead of 0/1
 
     logger.info(`Priorité de la note ${req.params.id} modifiée: ${priority}`);
     res.json({ message: 'Priorité modifiée avec succès', priority });
diff --git a/routes/rss.routes-v2.js b/routes/rss.routes-v2.js
index e24b413..464b7fe 100644
--- a/routes/rss.routes-v2.js
+++ b/routes/rss.routes-v2.js
@@ -88,7 +88,7 @@ router.put('/feeds/:id', requireAdmin, async (req, res) => {
 
     await runQuery(
       'UPDATE rss_feeds SET enabled = $1 WHERE id = $2',
-      [enabled ? 1 : 0, req.params.id]
+      [enabled, req.params.id] // BOOLEAN instead of 0/1
     );
 
     logger.info(`Flux ${enabled ? 'activé' : 'désactivé'}: ${req.params.id}`);
diff --git a/routes/rss.routes.js b/routes/rss.routes.js
index e19daa9..e296fe5 100644
--- a/routes/rss.routes.js
+++ b/routes/rss.routes.js
@@ -90,7 +90,7 @@ router.put('/feeds/:id', requireAdmin, async (req, res) => {
 
     await runQuery(
       'UPDATE rss_feeds SET enabled = $1 WHERE id = $2',
-      [enabled ? 1 : 0, req.params.id]
+      [enabled, req.params.id] // BOOLEAN instead of 0/1
     );
 
     logger.info(`Flux ${enabled ? 'activé' : 'désactivé'}: ${req.params.id}`);
diff --git a/routes/todos.routes.js b/routes/todos.routes.js
index 297be55..2c0eb86 100644
--- a/routes/todos.routes.js
+++ b/routes/todos.routes.js
@@ -140,17 +140,17 @@ router.put('/:id',
       if (completed !== undefined) {
         paramCount++;
         updates.push(`completed = $${paramCount}`);
-        params.push(completed ? 1 : 0);
+        params.push(completed); // BOOLEAN instead of 0/1
       }
       if (priority !== undefined) {
         paramCount++;
         updates.push(`priority = $${paramCount}`);
-        params.push(priority ? 1 : 0);
+        params.push(priority); // BOOLEAN instead of 0/1
       }
       if (in_progress !== undefined) {
         paramCount++;
         updates.push(`in_progress = $${paramCount}`);
-        params.push(in_progress ? 1 : 0);
+        params.push(in_progress); // BOOLEAN instead of 0/1
       }
 
       if (updates.length > 0) {
@@ -179,12 +179,12 @@ router.patch('/:id/toggle', async (req, res) => {
       return res.status(404).json({ error: 'Todo non trouvé' });
     }
 
-    const newCompleted = todo.completed ? 0 : 1;
+    const newCompleted = !todo.completed; // BOOLEAN instead of 0/1
     await runQuery('UPDATE global_todos SET completed = $1 WHERE id = $2', [newCompleted, req.params.id]);
 
     logger.info(`Todo global ${newCompleted ? 'complété' : 'réouvert'} (ID: ${req.params.id}) par ${req.user.username}`);
 
-    res.json({ message: 'Todo modifié avec succès', completed: newCompleted === 1 });
+    res.json({ message: 'Todo modifié avec succès', completed: newCompleted });
   } catch (error) {
     logger.error('Erreur lors du toggle du todo:', error);
     res.status(500).json({ error: 'Erreur serveur' });
@@ -204,12 +204,12 @@ router.patch('/:id/priority', async (req, res) => {
         return res.status(404).json({ error: 'Todo non trouvé' });
       }
 
-      const newPriority = todo.priority ? 0 : 1;
+      const newPriority = !todo.priority; // BOOLEAN instead of 0/1
       await runQuery('UPDATE global_todos SET priority = $1 WHERE id = $2', [newPriority, req.params.id]);
 
       logger.info(`Todo global ${newPriority ? 'marqué prioritaire' : 'démarqué prioritaire'} (ID: ${req.params.id}) par ${req.user.username}`);
 
-      res.json({ message: 'Priorité modifiée avec succès', priority: newPriority === 1 });
+      res.json({ message: 'Priorité modifiée avec succès', priority: newPriority });
     } catch (priorityError) {
       // Si le champ priority n'existe pas encore, retourner un message d'erreur explicite
       if (priorityError.message && priorityError.message.includes('priority')) {
@@ -240,12 +240,12 @@ router.patch('/:id/in-progress', async (req, res) => {
         return res.status(404).json({ error: 'Todo non trouvé' });
       }
 
-      const newInProgress = todo.in_progress ? 0 : 1;
+      const newInProgress = !todo.in_progress; // BOOLEAN instead of 0/1
       await runQuery('UPDATE global_todos SET in_progress = $1 WHERE id = $2', [newInProgress, req.params.id]);
 
       logger.info(`Todo global ${newInProgress ? 'marqué en cours' : 'démarqué en cours'} (ID: ${req.params.id}) par ${req.user.username}`);
 
-      res.json({ message: 'Statut en cours modifié avec succès', in_progress: newInProgress === 1 });
+      res.json({ message: 'Statut en cours modifié avec succès', in_progress: newInProgress });
     } catch (inProgressError) {
       // Si le champ in_progress n'existe pas encore
       if (inProgressError.message && inProgressError.message.includes('in_progress')) {
diff --git a/routes/users.routes.js b/routes/users.routes.js
index 836f459..4d6cc7a 100644
--- a/routes/users.routes.js
+++ b/routes/users.routes.js
@@ -56,12 +56,12 @@ router.post('/',
       // Hasher le mot de passe
       const passwordHash = await bcrypt.hash(password, 12);
 
-      logger.info(`[CREATE USER] Début création - username: "${username}", is_admin: ${is_admin ? 1 : 0}`);
+      logger.info(`[CREATE USER] Début création - username: "${username}", is_admin: ${is_admin || false}`);
 
       // Créer l'utilisateur
       const result = await runQuery(
         'INSERT INTO users (username, password_hash, is_admin) VALUES ($1, $2, $3) RETURNING *',
-        [username, passwordHash, is_admin ? 1 : 0]
+        [username, passwordHash, is_admin || false] // BOOLEAN instead of 0/1
       );
 
       logger.info(`[CREATE USER] Utilisateur créé avec succès - ID: ${result.id}, username: "${username}"`);
@@ -111,7 +111,7 @@ router.put('/:id',
 
       // Mettre à jour le statut admin si fourni
       if (typeof is_admin !== 'undefined') {
-        await runQuery('UPDATE users SET is_admin = $1 WHERE id = $2', [is_admin ? 1 : 0, userId]);
+        await runQuery('UPDATE users SET is_admin = $1 WHERE id = $2', [is_admin, userId]); // BOOLEAN instead of 0/1
       }
 
       logger.info(`Utilisateur modifié: ${user.username} (ID: ${userId})`);