diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index e348513..d086be3 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -6,6 +6,8 @@ It's now possible to add profile metadata.
 
 If a post comes from a group or community (i.e. it has an `audience` field set), the buttons `Follow Group` or `Unfollow Group` are shown.
 
+Pinned posts are never purged.
+
 ## 2.41
 
 Added support for `Article` ActivityPub objects to correctly process reviews from #Bookwyrm instances and other similar software.