diff --git a/CHANGELOG.md b/CHANGELOG.md
index b0239a179..a0701f01e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@
 - [#3964](https://github.com/influxdata/telegraf/pull/3964): Add repl_oplog_window_sec metric to mongodb input.
 - [#3819](https://github.com/influxdata/telegraf/pull/3819): Add per-host shard metrics in mongodb input.
 - [#3999](https://github.com/influxdata/telegraf/pull/3999): Skip files with leading `..` in config directory.
+- [#4021](https://github.com/influxdata/telegraf/pull/4021): Add TLS support to socket_writer and socket_listener plugins.
 
 ## v1.6.1 [unreleased]