diff --git a/CHANGELOG.md b/CHANGELOG.md
index df47aca..1f614ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+
+## [v3.0.0-rc4] - 2021-08-22
+
 ### Fixed
 - Various MIME header decoding improvements
 
@@ -266,6 +269,7 @@ No change from beta1.
   specific message.
 
 [Unreleased]:   https://github.com/inbucket/inbucket/compare/master...develop
+[v3.0.0-rc4]:   https://github.com/inbucket/inbucket/compare/v3.0.0-rc2...v3.0.0-rc4
 [v3.0.0-rc2]:   https://github.com/inbucket/inbucket/compare/v3.0.0-rc1...v3.0.0-rc2
 [v3.0.0-rc1]:   https://github.com/inbucket/inbucket/compare/v3.0.0-beta3...v3.0.0-rc1
 [v3.0.0-beta3]: https://github.com/inbucket/inbucket/compare/v3.0.0-beta2...v3.0.0-beta3