diff --git a/event_import.md b/event_import.md
index 136043c..6c70a17 100644
--- a/event_import.md
+++ b/event_import.md
@@ -30,6 +30,8 @@ It neglets all event related fields but `title`, `summary` and `url` which it us
 - `id`: This is also used for the `url`.
 - [`name`](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-name): The events title.
 - [`startTime`](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-startTime)
+- [`to`](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-to)
+- [`type`]: must be `Event`
 
 ### Optional