diff --git a/ChangeLog b/ChangeLog
index 8424626d..9e60555a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,8 @@
 CHANGES
 =======
 
+ADD: new Orion indexes to optimize operations (#335)
+
 4.3.0
 
 ADD: new API to rename subservice (including mongo database of Orion, STH, CEP, IotAgents) (#330)