diff --git a/CHANGELOG.md b/CHANGELOG.md
index 066e02a32..b2e577af5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,20 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/).
 
 ### Security
 
+## [3.1.0] - 2017-10-06
+
+### Changed
+- backend/docker:
+    - switch to official client library
+    - display original image tag instead of language alias in log output
+    - set container name based on repo and job ID
+- cli: increase log level to "warn" for messages about receiving certain
+  signals.
+- processor: use the processor context when sending "Finish" state update
+
+### Fixed
+- backend/docker: do not remove links on container removal
+
 ## [3.0.2] - 2017-09-12
 
 ### Fixed
@@ -555,7 +569,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/).
 ### Added
 - Initial release
 
-[Unreleased]: https://github.com/travis-ci/worker/compare/v3.0.2...HEAD
+[Unreleased]: https://github.com/travis-ci/worker/compare/v3.1.0...HEAD
+[3.1.0]: https://github.com/travis-ci/worker/compare/v3.0.2...v3.1.0
 [3.0.2]: https://github.com/travis-ci/worker/compare/v3.0.1...v3.0.2
 [3.0.1]: https://github.com/travis-ci/worker/compare/v3.0.0...v3.0.1
 [3.0.0]: https://github.com/travis-ci/worker/compare/v2.11.0...v3.0.0