diff --git a/CHANGELOG.md b/CHANGELOG.md
index 81fcfa7..6eb2f59 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Support for CIP129 DRep ID - you can query DReps using both legacy format and CIP129 format. The `drep_id` and `hex` fields will reflect the format of the query param
+
+### Changed
+
+- BREAKING CHANGE: Endpoints `/governance/dreps` and `/governance/proposals/{tx_hash}/{cert_index}/votes` are now using CIP129 format
+
 ## [2.4.0] - 2024-11-20
 
 ### Added
diff --git a/src/routes/governance/proposals/tx-hash/cert-index/votes.ts b/src/routes/governance/proposals/tx-hash/cert-index/votes.ts
index 1a758c8..60df235 100644
--- a/src/routes/governance/proposals/tx-hash/cert-index/votes.ts
+++ b/src/routes/governance/proposals/tx-hash/cert-index/votes.ts
@@ -37,7 +37,12 @@ async function route(fastify: FastifyInstance) {
         gracefulRelease(clientDbSync);
 
         for (const row of rows) {
-          // Convert voter id to cip129 format
+          if (!row.voter.startsWith('drep')) {
+            // Keep non-DRep voter unmodified
+            continue;
+          }
+
+          // Convert voter id to CIP129 format
           const cip129DRep = dbSyncDRepToCIP129({
             drep_id: row.voter,
             has_script: row.voter_has_script,