diff --git a/CHANGELOG.md b/CHANGELOG.md
index c8fd17f..10c455c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### Security
 
-Initial version
+## [v0.4.0] (2021-03-26)
 
-[unreleased]: https://github.com/TheThingsNetwork/lorawan-stack-migrate/
+### Changed
+
+- Rate limit RPC calls to TTN v2 to a maximum of 5 calls per second, to respect global TTN v2 rate limits.
+- Disable `DevStatusReq` MAC command for devices exported from TTN v2.
+
+### Fixed
+
+- Retry when receiving errors of type ResourceExhausted and Unavailable, with a backoff.
+
+[0.4.0]: https://github.com/TheThingsNetwork/lorawan-stack/compare/v0.4.0...master