diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1cbd66a182b..c90d39df817 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,26 @@
 # Changelog
 
+## Unreleased
+
+### Breaking Changes
+
+### Upcoming Breaking Changes
+- RPC changes to enhance compatibility with other ELs
+  - Block number parameter in RPCs will only support hex values. Support for non-hex (decimal) block number parameters is deprecated.
+  - This affects several RPCs, including `admin_logsRemoveCache`, `debug_getRawHeader`, `eth_call`, `eth_simulateV1`, `trace_call` and more.
+- Sunsetting features - for more context on the reasoning behind the deprecation of these features, including alternative options, read [this blog post](https://www.lfdecentralizedtrust.org/blog/sunsetting-tessera-and-simplifying-hyperledger-besu)
+  - Proof of Work consensus (PoW)
+- `--min-block-occupancy-ratio` is deprecated and will be removed in a future release
+- Plugin API
+  - `PluginTransactionSelectorFactory.create(final SelectorsStateManager selectorsStateManager)` is deprecated for removal
+- `--Xmax-tracked-seen-txs-per-peer` renamed to `--Xmax-tracked-seen-txs` (old name kept as deprecated alias will be removed in a future release)
+- Besu will require Java JDK 25 to build and run in a future release.
+
+### Bug fixes
+
+### Additions and Improvements
+
+
 ## 26.4.0
 
 ### Repository Migration