diff --git a/CHANGELOG.md b/CHANGELOG.md
index eb2726c..ed078dd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 <!-- next-header -->
 ## [Unreleased] - ReleaseDate
 
+### Added
+
+- Added defmt support behind a feature flag.
+
+### Changed
+
+- Updated `rtcc` to version  0.4.0 because it has defmt support.
+
 ## [0.6.0] - 2025-01-02
 
 ### Changed
@@ -99,4 +107,4 @@ this CHANGELOG.
 [0.3.2]: https://github.com/eldruin/ds323x-rs/compare/v0.3.1...v0.3.2
 [0.3.1]: https://github.com/eldruin/ds323x-rs/compare/v0.3.0...v0.3.1
 [0.3.0]: https://github.com/eldruin/ds323x-rs/compare/v0.2.0...v0.3.0
-[0.2.0]: https://github.com/eldruin/ds323x-rs/compare/v0.1.0...v0.2.0
\ No newline at end of file
+[0.2.0]: https://github.com/eldruin/ds323x-rs/compare/v0.1.0...v0.2.0