diff --git a/benchmarks/utils/runbench.js b/benchmarks/utils/runbench.js
index fb0dac324..d9660acf7 100644
--- a/benchmarks/utils/runbench.js
+++ b/benchmarks/utils/runbench.js
@@ -54,8 +54,8 @@ function runBenchmark (name, done) {
   benchmarkResults[name] = {}
 
   const processor = through(function (line, enc, cb) {
-    const [ label, time ] = ('' + line).split(': ')
-    const [ target, iterations ] = label.split('*')
+    const [label, time] = ('' + line).split(': ')
+    const [target, iterations] = label.split('*')
     const logger = target.replace('bench', '')
 
     if (!benchmarkResults[name][logger]) benchmarkResults[name][logger] = []
diff --git a/browser.js b/browser.js
index 1c61232c3..da8d9cc1b 100644
--- a/browser.js
+++ b/browser.js
@@ -152,12 +152,12 @@ pino.levels = {
     trace: 10
   },
   labels: {
-    '10': 'trace',
-    '20': 'debug',
-    '30': 'info',
-    '40': 'warn',
-    '50': 'error',
-    '60': 'fatal'
+    10: 'trace',
+    20: 'debug',
+    30: 'info',
+    40: 'warn',
+    50: 'error',
+    60: 'fatal'
   }
 }
 
diff --git a/lib/proto.js b/lib/proto.js
index 949dd6407..1ec71cf1d 100644
--- a/lib/proto.js
+++ b/lib/proto.js
@@ -1,4 +1,7 @@
 'use strict'
+
+/* eslint no-prototype-builtins: 0 */
+
 const { EventEmitter } = require('events')
 const SonicBoom = require('sonic-boom')
 const flatstr = require('flatstr')
diff --git a/lib/tools.js b/lib/tools.js
index ccb7e3cdc..586c84d14 100644
--- a/lib/tools.js
+++ b/lib/tools.js
@@ -1,5 +1,7 @@
 'use strict'
 
+/* eslint no-prototype-builtins: 0 */
+
 const format = require('quick-format-unescaped')
 const { mapHttpRequest, mapHttpResponse } = require('pino-std-serializers')
 const SonicBoom = require('sonic-boom')
diff --git a/package.json b/package.json
index 454280d88..d4bb5716d 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
     "qodaa": "^1.0.1",
     "snazzy": "^8.0.0",
     "split2": "^3.1.1",
-    "standard": "^12.0.1",
+    "standard": "^13.0.2",
     "steed": "^1.1.3",
     "tap": "^12.6.0",
     "tape": "^4.10.1",
diff --git a/test/basic.test.js b/test/basic.test.js
index 98b02bffe..e4ff500cf 100644
--- a/test/basic.test.js
+++ b/test/basic.test.js
@@ -57,7 +57,7 @@ function levelTest (name, level) {
     is(result.level, level)
     is(result.hello, 'world')
     is(result.v, 1)
-    same(Object.keys(obj), [ 'hello' ])
+    same(Object.keys(obj), ['hello'])
   })
 
   test(`passing an object and a string at level ${name}`, async ({ is, same }) => {
@@ -77,7 +77,7 @@ function levelTest (name, level) {
       hello: 'world',
       v: 1
     })
-    same(Object.keys(obj), [ 'hello' ])
+    same(Object.keys(obj), ['hello'])
   })
 
   test(`overriding object key by string at level ${name}`, async ({ is, same }) => {
diff --git a/test/browser-serializers.test.js b/test/browser-serializers.test.js
index 94afc7a43..5ff787a6c 100644
--- a/test/browser-serializers.test.js
+++ b/test/browser-serializers.test.js
@@ -257,7 +257,7 @@ test('children serializers get called', ({ end, is }) => {
     }
   })
 
-  const child = parent.child({ 'a': 'property', serializers: childSerializers })
+  const child = parent.child({ a: 'property', serializers: childSerializers })
 
   child.fatal({ test: 'test' })
   end()
diff --git a/test/browser.test.js b/test/browser.test.js
index f1999316f..76caba307 100644
--- a/test/browser.test.js
+++ b/test/browser.test.js
@@ -82,12 +82,12 @@ test('exposes levels object', ({ end, same }) => {
       trace: 10
     },
     labels: {
-      '10': 'trace',
-      '20': 'debug',
-      '30': 'info',
-      '40': 'warn',
-      '50': 'error',
-      '60': 'fatal'
+      10: 'trace',
+      20: 'debug',
+      30: 'info',
+      40: 'warn',
+      50: 'error',
+      60: 'fatal'
     }
   })
 
@@ -103,7 +103,7 @@ test('exposes LOG_VERSION', ({ end, is }) => {
 test('exposes faux stdSerializers', ({ end, ok, same }) => {
   ok(pino.stdSerializers)
   // make sure faux stdSerializers match pino-std-serializers
-  for (let serializer in pinoStdSerializers) {
+  for (const serializer in pinoStdSerializers) {
     ok(pino.stdSerializers[serializer], `pino.stdSerializers.${serializer}`)
   }
   // confirm faux methods return empty objects
diff --git a/test/custom-levels.test.js b/test/custom-levels.test.js
index 8633638b8..7eec50f04 100644
--- a/test/custom-levels.test.js
+++ b/test/custom-levels.test.js
@@ -1,5 +1,7 @@
 'use strict'
 
+/* eslint no-prototype-builtins: 0 */
+
 const { test } = require('tap')
 const { sink, once } = require('./helper')
 const pino = require('../')
diff --git a/test/error.test.js b/test/error.test.js
index 4f0cfa71d..ea7c04cf4 100644
--- a/test/error.test.js
+++ b/test/error.test.js
@@ -1,4 +1,7 @@
 'use strict'
+
+/* eslint no-prototype-builtins: 0 */
+
 const os = require('os')
 const { test } = require('tap')
 const { sink, once } = require('./helper')
diff --git a/test/serializers.test.js b/test/serializers.test.js
index 8c51ad9e0..c6a707935 100644
--- a/test/serializers.test.js
+++ b/test/serializers.test.js
@@ -130,7 +130,7 @@ test('children serializers get called', async ({ is }) => {
     test: 'this'
   }, stream)
 
-  const child = parent.child({ 'a': 'property', serializers: childSerializers })
+  const child = parent.child({ a: 'property', serializers: childSerializers })
 
   child.fatal({ test: 'test' })
   const o = await once(stream, 'data')
diff --git a/test/timestamp.test.js b/test/timestamp.test.js
index c786a89de..89e784398 100644
--- a/test/timestamp.test.js
+++ b/test/timestamp.test.js
@@ -1,5 +1,7 @@
 'use strict'
 
+/* eslint no-prototype-builtins: 0 */
+
 const { test } = require('tap')
 const { sink, once } = require('./helper')
 const pino = require('../')