diff --git a/ChangeLog b/ChangeLog
index fdda991..ea5e4a5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 2019-05-14 Alibaba Cloud.
 	* VERSION: 1.6.1
-	* IMPROVE: support fetching db address from sentinel.
+	* IMPROVE: support fetching db address from sentinel, the failover
+	mechanism is not yet supported.
 2019-05-08 Alibaba Cloud.
 	* VERSION: 1.6.0
 	* FEATURE: source address supports cluster.