diff --git a/README.md b/README.md
index d733f43..f836f20 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,7 @@ CAPTURE_TRANSCRIPTS=
 * The bot listens to all the incoming messages and prints them to a transcript if that setting is enabled (`CAPTURE_TRANSCRIPT`)
 * Messages that start with `!bot` are treated as commands.
 * The bot sends a notification to the support chatroom and the Support Chat Notifications room if it crashes
+* On startup, the bot deletes all of the old device IDs for its account
 
 ### Bot commands