diff --git a/reposilite-frontend/fake-api/extensions.cjs b/reposilite-frontend/fake-api/extensions.cjs
index 7e311b7f1..08e2d067e 100644
--- a/reposilite-frontend/fake-api/extensions.cjs
+++ b/reposilite-frontend/fake-api/extensions.cjs
@@ -32,7 +32,7 @@ const authorized = (req, success, failure) => {
 }
 
 const invalidCredentials = (res) =>
-  res.status(401).send('Invalid credentials')
+  res.status(401).send({message:'Invalid credentials'})
 
 const sendMessage = (connection, message) =>
   connection.send(`${new Date().toDateString()} ${message}`)