diff --git a/bulk_writer.js b/bulk_writer.js
index 2dff7a0..56a8870 100644
--- a/bulk_writer.js
+++ b/bulk_writer.js
@@ -129,8 +129,7 @@ BulkWriter.prototype.write = function write(body) {
       wait_for_active_shards: this.waitForActiveShards,
       timeout: this.interval + 'ms',
     })
-    .then((response) => {
-      const res = response.body;
+    .then((res) => {
       if (res && res.errors && res.items) {
         const err = new Error('Elasticsearch error');
         res.items.forEach((item, itemIndex) => {
diff --git a/package.json b/package.json
index 25cc2a3..fd7e267 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "winston-elasticsearch",
-  "version": "0.17.2",
+  "version": "0.17.3",
   "description": "An Elasticsearch transport for winston",
   "main": "index",
   "authors": [