diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7d22ec6c7..a05136d85 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@
 
 ### New Processors
 
+- [regex](./plugins/processors/regex/README.md) - Contributed by @44px
 - [topk](./plugins/processors/topk/README.md) - Contributed by @mirath
 
 ### New Outputs
@@ -47,6 +48,7 @@
 - [#4167](https://github.com/influxdata/telegraf/pull/4167): Added several important elasticsearch cluster health metrics.
 - [#4094](https://github.com/influxdata/telegraf/pull/4094): Add batch mode to mqtt output.
 - [#4158](https://github.com/influxdata/telegraf/pull/4158): Add aurora input plugin.
+- [#3839](https://github.com/influxdata/telegraf/pull/3839): Add regex processor plugin.
 
 ### Bugfixes
 
diff --git a/README.md b/README.md
index 3275a6796..d4d19db0f 100644
--- a/README.md
+++ b/README.md
@@ -270,6 +270,7 @@ formats may be used with input plugins supporting the `data_format` option:
 
 * [override](./plugins/processors/override)
 * [printer](./plugins/processors/printer)
+* [regex](./plugins/processors/regex)
 * [topk](./plugins/processors/topk)
 
 ## Aggregator Plugins