diff --git a/src/credentials.ts b/src/credentials.ts
index 96ea895..e79b3c1 100644
--- a/src/credentials.ts
+++ b/src/credentials.ts
@@ -31,7 +31,7 @@ export const signUpHandler =
         });
       }
 
-      res.json(response);
+      res.status(400).json(response);
       return;
     }