diff --git a/api.yaml b/api.yaml
index c02ac4c..3893b50 100644
--- a/api.yaml
+++ b/api.yaml
@@ -190,6 +190,12 @@ paths:
                   content:
                     type: string
                     description: The article itself (its content), encoded as base64
+        401:
+          description: Not authorized (either no valid cookie or no author from the given article)
+        404:
+          description: No article with the given id
+        422:
+          description: Invalid id parameter was given
     post:
       summary: Uploads a new article
       requestBody: