diff --git a/CHANGELOG.md b/CHANGELOG.md
index c0c141fb7..87e6ff8cb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -61,6 +61,7 @@
 - [#3459](https://github.com/influxdata/telegraf/pull/3459): Add systemd unit pid and cgroup matching to procstat.
 - [#3477](https://github.com/influxdata/telegraf/pull/3477): Add Particle Webhook Plugin.
 - [#3471](https://github.com/influxdata/telegraf/pull/3471): Use MAX() instead of SUM() for latency measurements in sqlserver.
+- [#3490](https://github.com/influxdata/telegraf/pull/3490): Add index by week number to Elasticsearch output.
 
 ### Bugfixes