diff --git a/docs/content/doc/usage/caldav.md b/docs/content/doc/usage/caldav.md
index 72274116f08..23d4277f490 100644
--- a/docs/content/doc/usage/caldav.md
+++ b/docs/content/doc/usage/caldav.md
@@ -69,10 +69,12 @@ Vikunja **currently does not** support these properties:
 ### Working
 
 * [Evolution](https://wiki.gnome.org/Apps/Evolution/)
+* [OpenTasks](https://opentasks.app/) + [DAVx⁵](https://www.davx5.com/)
 
 ### Not working
 
 * [Tasks (Android)](https://tasks.org/)
+* [Thunderbird (68)](https://www.thunderbird.net/)
 
 ## Dev logs