diff --git a/lib/middlewares/ca.js b/lib/middlewares/ca.js
index 0c202d0a..04b3dbc0 100644
--- a/lib/middlewares/ca.js
+++ b/lib/middlewares/ca.js
@@ -8,7 +8,7 @@ function ca (req, res) {
     .then(ca => res.json({ ca }))
     .catch(error => {
       logger.error(error.message)
-      res.status(403).json({ error: 'forbidden' })
+      return res.status(403).json({ error: 'forbidden' })
     })
 }