diff --git a/frontend/run/server.js b/frontend/run/server.js
index 6d26503cf..12a9cbd79 100644
--- a/frontend/run/server.js
+++ b/frontend/run/server.js
@@ -28,7 +28,7 @@ app.use(express.static(path.join(__dirname, '../dist')))
 app.get('*', (req, res) => {
   // eslint-disable-next-line no-console
   console.log('Request', req)
-  res.sendFile(__dirname, '../dist/index.html')
+  res.sendFile(path.join(__dirname, '../dist/index.html'))
 })
 
 app.listen(port, hostname, () => {