diff --git a/app/entities/page.mdx b/app/entities/page.mdx
index ae6d366..4b2b21a 100644
--- a/app/entities/page.mdx
+++ b/app/entities/page.mdx
@@ -34,7 +34,7 @@ Any field in an entity not marked as `required` may be omitted or set to `null`.
- URI of the entity. Must `id`. Should be unique and resolve to the entity.
+ URI of the entity. Should be unique and resolve to the entity. Must be an absolute URI.
Extensions to the entity. Use this to add custom properties to the entity.