diff --git a/CHANGES-4.3.md b/CHANGES-4.3.md
index 9063c7129..efd3c5db7 100644
--- a/CHANGES-4.3.md
+++ b/CHANGES-4.3.md
@@ -23,8 +23,9 @@ File format:
   to force an immediate reload of all certificates after the files are updated on disk.
 * Refactor the ExProto so that anonymous clients can also be displayed on the dashboard [#6983]
 * Force shutdown of processe that cannot answer takeover event [#7026]
-
 * `topic` parameter in bridge configuration can have `${node}` substitution (just like in `clientid` parameter)
+* Add UTF-8 string validity check in `strict_mode` for MQTT packet.
+  When set to true, invalid UTF-8 strings will cause the client to be disconnected. i.e. client ID, topic name. [#7261]
 
 ### Bug fixes