diff --git a/README.md b/README.md
index 6e48daa..2573204 100644
--- a/README.md
+++ b/README.md
@@ -20,12 +20,12 @@ Internally, a HTTP API is exposed, and a job queue is used to distribute the che
 
 - [ ] Do not return empty list on / when no results from agents. (!17)
 - [X] donner un aperçu rapide de l’état de la supervision.
-- [ ] Use background tasks for alerting (#23)
-- [ ] Delete outdated tasks from config (#19, !25)
+- [X] Use background tasks for alerting (#23)
+- [X] Delete outdated tasks from config (#19, !25)
 - [X] Implement alerting tasks (#15, 16, !13)
 - [X] Handles multiple alerting backends (email, sms, gotify) (!13)
-- [ ] add an "unknown" severity for check errors (!17)
-- [ ] Add a command to generate new authentication token (#22)
+- [X] add an "unknown" severity for check errors (!17)
+- [X] Add a command to generate new authentication token (#22)
 - [ ] Add a way to specify the severity of the alerts in the config
 - [ ] Allow passing a dict to check
 - [ ] A configuration flag can automatically add a check of 301 redirection from HTTP to HTTPS