diff --git a/backend/server.js b/backend/server.js
index 9d9767b..164e8cf 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -184,7 +184,7 @@ app.use((err, req, res, next) => {
 });
 
 // Start server
-app.listen(PORT, () => {
+app.listen(PORT, '0.0.0.0', () => {
   console.log(`🚀 Backend server running on port ${PORT}`);
   console.log(`📊 Health check: http://localhost:${PORT}/health`);
   console.log(`📝 API endpoints: http://localhost:${PORT}/api/todos`);