diff --git a/home-automation/02-device-registry/README.md b/home-automation/02-device-registry/README.md
index 169be9c..dda484c 100644
--- a/home-automation/02-device-registry/README.md
+++ b/home-automation/02-device-registry/README.md
@@ -6,8 +6,8 @@ All responses will have the form
 
 ```json
 {
-    "data": "Mixed type holding the content of the response",
     "message": "Description of what happened"
+    "data": "Mixed type holding the content of the response",
 }
 ```
 
@@ -58,6 +58,7 @@ If a device with the given identifier already exists, the existing device will b
 **Response**
 
 - `201 Created` on success
+- `400 BAD REQUEST` on plure due to incorrect data
 
 ```json
 {