diff --git a/src/entities/elastic-storage/block-data.js b/src/entities/elastic-storage/block-data.js
index d52c667..2b7d22a 100644
--- a/src/entities/elastic-storage/block-data.js
+++ b/src/entities/elastic-storage/block-data.js
@@ -15,7 +15,7 @@ class BlockData extends ElasticData {
 
   storedUTxOs: Array<UtxoType>
 
-  allUtxos: {string: UtxoType}
+  allUtxos: { [string]: UtxoType }
 
   inputsData: [] = []
 
diff --git a/src/entities/elastic-storage/elastic-storage-processor.js b/src/entities/elastic-storage/elastic-storage-processor.js
index 6b9160d..3c836d9 100644
--- a/src/entities/elastic-storage/elastic-storage-processor.js
+++ b/src/entities/elastic-storage/elastic-storage-processor.js
@@ -262,7 +262,7 @@ class ElasticStorageProcessor implements StorageProcessor {
   async storeGenesisUtxos(utxos: Array<UtxoType>) {
     // TODO: check bulk upload response
     this.logger.debug('storeGenesisUtxos: store utxos to "txio" index and create fake txs in "tx" index')
-    const chunk = this.lastChunk + 1
+    const chunk = ++this.lastChunk
 
     const utxosObjs = utxos.map((utxo) => new UtxoData(utxo))
     const txioBody = formatBulkUploadBody(utxosObjs, {
@@ -331,7 +331,7 @@ class ElasticStorageProcessor implements StorageProcessor {
     const utxosToStore = []
     const txInputsIds = []
     const blockTxs = []
-    const chunk = this.lastChunk + 1
+    const chunk = ++this.lastChunk
     for (const block of blocks) {
       const txs = block.getTxs()
       if (txs.length > 0) {