diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8295be122c..fad03d608b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+Starting with version `6.6.0` of the `sentry`, [Sentry's version >= v21.9.0](https://github.com/getsentry/self-hosted/releases) is required or you have to manually disable sending client reports via the `sendClientReports` option. This only applies to self-hosted Sentry. If you are using [sentry.io](https://sentry.io), no action is needed.
+
 * Fix: Profiling rate decreased from 300hz to 100hz; fixed profiling traces folder creation on manual sdk init (#1997)
 * Fix: Allow disabling sending of client reports via Android Manifest and external options (#2007)