diff --git a/CHANGELOG.md b/CHANGELOG.md
index 96906573..3b001a7e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,20 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.21.0] - 2020-09-09
+
+### Added
+- The `timestamp` operator can now parse timestamps that use a comma separator ([Go v1.17](https://golang.org/doc/go1.17#time))
+- `journald_input` now accepts `units` and `priority` settings ([PR252](https://github.com/open-telemetry/opentelemetry-log-collection/pull/252))
+- `file_input` will now trim whitespace when using `multiline` ([PR212](https://github.com/open-telemetry/opentelemetry-log-collection/pull/212))
+
+### Changed
+- Operator IDs are now autogenerated sequentially, removing the necessity to specify the `id` field in most circumstances ([PR246](https://github.com/open-telemetry/opentelemetry-log-collection/pull/246))
+- Updated to go version 1.17 ([PR248](https://github.com/open-telemetry/opentelemetry-log-collection/pull/248))
+
+### Fixed
+- `file_input`'s `force_flush_period` now defaults to `500ms`, ensuring that the use of `multiline.line_start_regex` does not cause ommision of the last line of each file ([PR261](https://github.com/open-telemetry/opentelemetry-log-collection/pull/261))
+
 ## [0.20.0] - 2020-07-27
 
 ### Added