diff --git a/.travis.yml b/.travis.yml
index 363f1b1..88f1b68 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,14 @@
 language: node_js
 sudo: false
 node_js:
-- '4'
 - '6'
 - '8'
+- '10'
 env:
   matrix:
   - ELASTIC_VERSION="2.3.0" ELASTIC_URL=https://download.elasticsearch.org/elasticsearch/release/org/elasticsearch/distribution/tar/elasticsearch/2.3.0/elasticsearch-2.3.0.tar.gz
-  - ELASTIC_VERSION="5.0.1" ELASTIC_URL=https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.0.1.tar.gz
+  - ELASTIC_VERSION="5.6.12" ELASTIC_URL=https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.6.12.tar.gz
+  - ELASTIC_VERSION="6.4.1" ELASTIC_URL=https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.4.1.tar.gz
   global:
   - secure: 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
 before_install:
diff --git a/docker-compose-v6.yml b/docker-compose-v6.yml
new file mode 100644
index 0000000..18bfeb6
--- /dev/null
+++ b/docker-compose-v6.yml
@@ -0,0 +1,13 @@
+---
+version: '3.6'
+services:
+  elasticsearch:
+    image: docker.elastic.co/elasticsearch/elasticsearch:6.4.1
+    container_name: elasticsearch
+    ports: ['9200:9200']
+
+  kibana:
+    image: docker.elastic.co/kibana/kibana:6.4.1
+    container_name: kibana
+    ports: ['5601:5601']
+    depends_on: ['elasticsearch']
diff --git a/package.json b/package.json
index 5e48400..c7b741b 100644
--- a/package.json
+++ b/package.json
@@ -22,21 +22,21 @@
   "author": "Matteo Collina <hello@matteocollina.com>",
   "license": "MIT",
   "devDependencies": {
-    "pino": "^4.7.2",
+    "pino": "^5.0.0",
     "pre-commit": "^1.2.2",
-    "proxyquire": "^1.8.0",
-    "standard": "^10.0.0",
-    "tap": "^10.7.2"
+    "proxyquire": "^2.1.0",
+    "standard": "^12.0.1",
+    "tap": "^12.0.1"
   },
   "dependencies": {
-    "aws-sdk": "^2.133.0",
-    "elasticsearch": "^13.3.1",
+    "aws-sdk": "^2.329.0",
+    "elasticsearch": "^15.1.1",
     "fast-json-parse": "^1.0.3",
-    "http-aws-es": "^3.1.0",
+    "http-aws-es": "^6.0.0",
     "minimist": "^1.2.0",
-    "pump": "^1.0.2",
-    "readable-stream": "^2.3.3",
-    "split2": "^2.2.0"
+    "pump": "^3.0.0",
+    "readable-stream": "^3.0.6",
+    "split2": "^3.0.0"
   },
   "repository": {
     "type": "git",
diff --git a/pino-elasticsearch.js b/pino-elasticsearch.js
index 3f32656..394b4e8 100644
--- a/pino-elasticsearch.js
+++ b/pino-elasticsearch.js
@@ -77,7 +77,7 @@ function pinoElasticSearch (opts) {
       })
     },
     write: function (body, enc, cb) {
-      const obj = {index, type, body}
+      const obj = { index, type, body }
       client.index(obj, function (err, data) {
         if (!err) {
           splitter.emit('insert', data, body)
diff --git a/test/acceptance.test.js b/test/acceptance.test.js
index 64ed9ac..a9be444 100644
--- a/test/acceptance.test.js
+++ b/test/acceptance.test.js
@@ -23,8 +23,8 @@ tap.tearDown(() => {
 })
 
 tap.beforeEach((done) => {
-  client.indices.delete({index}, () => {
-    client.indices.create({index}, done)
+  client.indices.delete({ index }, () => {
+    client.indices.create({ index }, done)
   })
 })
 
@@ -33,7 +33,7 @@ setTimeout(function () {
   process.exit(1)
 }, 60 * 1000).unref()
 
-test('store a log line', {timeout}, (t) => {
+test('store a log line', { timeout }, (t) => {
   t.plan(3)
 
   const instance = elastic({ index, type, consistency, host, port })
@@ -55,7 +55,7 @@ test('store a log line', {timeout}, (t) => {
   })
 })
 
-test('store an deeply nested log line', {timeout}, (t) => {
+test('store an deeply nested log line', { timeout }, (t) => {
   t.plan(4)
 
   const instance = elastic({ index, type, consistency, host, port })
@@ -85,7 +85,7 @@ test('store an deeply nested log line', {timeout}, (t) => {
   })
 })
 
-test('store lines in bulk', {timeout}, (t) => {
+test('store lines in bulk', { timeout }, (t) => {
   t.plan(15)
 
   const instance = elastic({ index, type, consistency, host, port })