diff --git a/next-hardfork-changes.md b/next-hardfork-changes.md
index b81fdf58..1cb1a281 100644
--- a/next-hardfork-changes.md
+++ b/next-hardfork-changes.md
@@ -2,3 +2,4 @@
   - computing subtrace lengths in `FoldFSM` (for more details see [PR 138](https://github.com/fluencelabs/aquavm/pull/138))
   - change `Sender` struct serialization way in `CallResult::RequestSentBy`
   - add a separate (empty?) state in `air_interpreter_data::CallResult` for `CallOutputValue::None` for hardening
+  - remove serde-based field renaming in data to support outdated data versions