diff --git a/CHANGELOG.md b/CHANGELOG.md
index 42a12c96b..566a155be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## 2019-11-19
 
 * Topic invitations - User to accept invitation, no auto accept - https://github.com/citizenos/citizenos-fe/issues/112
+* NOTE! Requires Citizen OS API >= 2.1.0 (2019-11-19)
 
 ## 2019-08-16