diff --git a/CHANGES.md b/CHANGES.md
index d7f9bf3..2d802d1 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,18 @@
+## 0.2.9 (unreleased)
+
+### Added
+
+### Changed
+
+- Upgrade `ocaml` to `5.2`.
+- Upgrade `dune` to `3.16`.
+
+### Deprecated
+
+### Fixed
+
+### Removed
+
 ## 0.2.8 (2024-05-05)
 
 ### Removed