diff --git a/backend/index.js b/backend/index.js
index 8d80c02..7b111fa 100644
--- a/backend/index.js
+++ b/backend/index.js
@@ -100,8 +100,8 @@ app.get('/read/:hash', async (req, res) => {
 });
 
 app.get('*', (req, res) => {
-  console.log(`req.path: ${req.path}`);
-  res.send('Hello World!');
+  console.log(`404 req.path: ${req.path}`);
+  res.status(404).json({ errorCode: 404 });
 });
 
 app.listen(port, () => {