diff --git a/yarn-project/kv-store/src/lmdb/store.ts b/yarn-project/kv-store/src/lmdb/store.ts
index 7f9286403ce..02fc4cc787a 100644
--- a/yarn-project/kv-store/src/lmdb/store.ts
+++ b/yarn-project/kv-store/src/lmdb/store.ts
@@ -30,7 +30,7 @@ export class AztecLmdbStore implements AztecKVStore {
     });
 
     this.#multiMapData = rootDb.openDB('data_dup_sort', {
-      encoding: 'msgpack',
+      encoding: 'ordered-binary',
       keyEncoding: 'ordered-binary',
       dupSort: true,
     });