diff --git a/services/horizon/CHANGELOG.md b/services/horizon/CHANGELOG.md
index 9523d2f039..193b731298 100644
--- a/services/horizon/CHANGELOG.md
+++ b/services/horizon/CHANGELOG.md
@@ -8,7 +8,7 @@ file. This project adheres to [Semantic Versioning](http://semver.org/).
 ## 2.28.1
 
 ### Fixed
-- Submitting transaction with a future gapped sequence number when horizon ingestion is lagging behind core, may result in delayed 60s timeout response ([5191](https://github.com/stellar/go/pull/5191))
+- Submitting transaction with a future gapped sequence number greater than 1 past current source account sequence, may result in delayed 60s timeout response, rather than expected HTTP 400 error response with `result_codes: {transaction: "tx_bad_seq"}` ([5191](https://github.com/stellar/go/pull/5191))
 
 
 ## 2.28.0