diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8e023cc185..630275aa8a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -68,6 +68,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Client Breaking Changes
 
+* [\#9859](https://github.com/cosmos/cosmos-sdk/pull/9859) The `default` pruning strategy now keeps the last 362880 blocks instead of 100. 362880 equates to roughly enough blocks to cover the entire unbonding period assuming a 21 day unbonding period and 5s block time.
 * [\#9594](https://github.com/cosmos/cosmos-sdk/pull/9594) Remove legacy REST API. Please see the [REST Endpoints Migration guide](https://docs.cosmos.network/master/migrations/rest.html) to migrate to the new REST endpoints.
 * [\#9781](https://github.com/cosmos/cosmos-sdk/pull/9781) Improve`withdraw-all-rewards` UX when broadcast mode `async` or `async` is used.
 * [\#9785](https://github.com/cosmos/cosmos-sdk/issues/9785) Missing coin denomination in logs