diff --git a/dental-server/installer/check-installation.js b/dental-server/installer/check-installation.js
index 843ea90..598b76e 100644
--- a/dental-server/installer/check-installation.js
+++ b/dental-server/installer/check-installation.js
@@ -3,7 +3,7 @@ const path = require('path');
 const db = require('../database');
 
 async function checkInstallation() {
-    const installedFile = fs.existsSync(path.join(__dirname, '..', '.installed'));
+    const installedFile = fs.existsSync(path.join(__dirname, '..', 'data', '.installed'));
     let currentVersion = '1.0.0';
     let databaseExists = false;
     let userExists = false;
diff --git a/dental-server/server.js b/dental-server/server.js
index c15c990..ef1eace 100644
--- a/dental-server/server.js
+++ b/dental-server/server.js
@@ -349,7 +349,7 @@ app.post('/api/install', async (req, res) => {
     console.log('✅ Usuário admin criado:', admin.username);
     
     // Criar arquivo .installed
-    const installedPath = path.join(__dirname, '.installed');
+    const installedPath = path.join(__dirname, 'data', '.installed');
     await fs.writeFile(installedPath, new Date().toISOString());
     
     // Criar arquivo version.txt
@@ -505,7 +505,8 @@ async function checkInstallationMiddleware(req, res, next) {
   // Para APIs que não são de instalação ou auth, verificar instalação
   if (isApiRoute) {
     try {
-      const installedFile = path.join(__dirname, '.installed');
+      // Procura no diretório persistente de dados
+      const installedFile = path.join(__dirname, 'data', '.installed');
       const fsSync = require('fs');
       
       if (!fsSync.existsSync(installedFile)) {
@@ -522,7 +523,7 @@ async function checkInstallationMiddleware(req, res, next) {
     // Se não for API e não for rota pública liberada acima, e estiver sem .installed,
     // manda pro install.
     try {
-      const installedFile = path.join(__dirname, '.installed');
+      const installedFile = path.join(__dirname, 'data', '.installed');
       const fsSync = require('fs');
       if (!fsSync.existsSync(installedFile)) {
         return res.redirect('/install');
@@ -1003,7 +1004,7 @@ async function start() {
       console.log(`🖼️  Processed at: ${PROCESSED_DIR}`);
       console.log('═══════════════════════════════════════════════════════');
       
-      const installedFile = path.join(__dirname, '.installed');
+      const installedFile = path.join(__dirname, 'data', '.installed');
       if (!fsSync.existsSync(installedFile)) {
         console.log('⚠️  Sistema não instalado. Acesse /install para configurar.');
       }