diff --git a/bin/cli/index.js b/bin/cli/index.js
index 0467e2e..4218adf 100755
--- a/bin/cli/index.js
+++ b/bin/cli/index.js
@@ -3,7 +3,7 @@
 'use strict'
 
 const pkg = require('../../package.json')
-require('update-notifier')({pkg}).notify()
+require('update-notifier')({ pkg }).notify()
 const debug = require('debug')(pkg.name)
 
 const workerFarm = require('worker-farm')
@@ -23,10 +23,10 @@ const cli = getFarmArgs(argv.farm)
 const [filename] = cli.input
 if (!filename) cli.showHelp()
 
-const {file: fileOpts} = argv
-const {flags: farmOpts} = cli
+const { file: fileOpts } = argv
+const { flags: farmOpts } = cli
 
-const {delayBetweenWorkers} = farmOpts
+const { delayBetweenWorkers } = farmOpts
 const numWorkers = getNumWorkers(farmOpts)
 const workersRange = [...Array(numWorkers).keys()]
 const spawnWorkers = workersRange.map(spawnWorker)
diff --git a/bin/get-farm-args/index.js b/bin/get-farm-args/index.js
index 036fd4c..2f23031 100644
--- a/bin/get-farm-args/index.js
+++ b/bin/get-farm-args/index.js
@@ -29,7 +29,7 @@ function getFarmArgs (argv) {
   const config = loadConfig(file)
   const flags = Object.assign({}, defaults, config, cli.flags)
 
-  return Object.assign(cli, {flags})
+  return Object.assign(cli, { flags })
 }
 
 module.exports = getFarmArgs
diff --git a/examples/basic/index.js b/examples/basic/index.js
index fe4a836..6ae6082 100644
--- a/examples/basic/index.js
+++ b/examples/basic/index.js
@@ -3,7 +3,7 @@
 const shared = []
 
 module.exports = function (opts) {
-  const {worker} = opts
+  const { worker } = opts
   console.log('-----------------------------')
   console.log(`Hello I'm worker #${worker}`)
   const printSharedWorkers = shared.join(' ') || 'none'
diff --git a/examples/factorial/index.js b/examples/factorial/index.js
index 3e1ca9f..404b995 100644
--- a/examples/factorial/index.js
+++ b/examples/factorial/index.js
@@ -1,6 +1,6 @@
 'use strict'
 
-const {ensureAsync, waterfall, whilst} = require('async')
+const { ensureAsync, waterfall, whilst } = require('async')
 const mutexify = require('mutexify')
 
 const memo = [1, 1]
@@ -17,18 +17,24 @@ const lock = mutexify()
 let index = 0
 
 module.exports = function (opts, cb) {
-  const {worker: workerNum, n} = opts
+  const { worker: workerNum, n } = opts
 
   whilst(
     () => index < n,
-    done => waterfall([
-      next => lock(release => release(next(null, ++index))),
-      ensureAsync((num, next) => {
-        const value = factorial(num)
-        console.log(`#${workerNum} factorial value=${index} result=${value}`)
-        return next()
-      })
-    ], done),
+    done =>
+      waterfall(
+        [
+          next => lock(release => release(next(null, ++index))),
+          ensureAsync((num, next) => {
+            const value = factorial(num)
+            console.log(
+              `#${workerNum} factorial value=${index} result=${value}`
+            )
+            return next()
+          })
+        ],
+        done
+      ),
     cb
   )
 }
diff --git a/examples/fibonacci-redis/index.js b/examples/fibonacci-redis/index.js
index e025894..7aa7158 100644
--- a/examples/fibonacci-redis/index.js
+++ b/examples/fibonacci-redis/index.js
@@ -1,6 +1,6 @@
 'use strict'
 
-const {ensureAsync, waterfall, during} = require('async')
+const { ensureAsync, waterfall, during } = require('async')
 const redis = require('redis').createClient()
 const pify = require('pify')
 const memo = [0, 1]
@@ -13,24 +13,29 @@ const fibonacciMemo = function (n) {
   return result
 }
 
-const fibonacci = num => num <= 1 ? 1 : fibonacci(num - 1) + fibonacci(num - 2)
+const fibonacci = num =>
+  num <= 1 ? 1 : fibonacci(num - 1) + fibonacci(num - 2)
 const REDIS_KEY = 'fibonacci'
 
 module.exports = async function (opts, cb) {
-  const {worker: workerNum, memo, n, isMaster} = opts
+  const { worker: workerNum, memo, n, isMaster } = opts
   const fn = memo ? fibonacciMemo : fibonacci
   if (isMaster) await pify(redis.set(REDIS_KEY, 0))
 
   during(
     next => redis.get(REDIS_KEY, (err, num) => next(err, num < n)),
-    done => waterfall([
-      next => redis.incr(REDIS_KEY, (err, n) => next(err, n)),
-      ensureAsync((n, next) => {
-        const result = fn(n)
-        console.log(`#${workerNum} fibonacci n=${n} result=${result}`)
-        return next()
-      })
-    ], done),
+    done =>
+      waterfall(
+        [
+          next => redis.incr(REDIS_KEY, (err, n) => next(err, n)),
+          ensureAsync((n, next) => {
+            const result = fn(n)
+            console.log(`#${workerNum} fibonacci n=${n} result=${result}`)
+            return next()
+          })
+        ],
+        done
+      ),
     cb
   )
 }
diff --git a/examples/fibonacci/index.js b/examples/fibonacci/index.js
index fa15581..2da9d8c 100644
--- a/examples/fibonacci/index.js
+++ b/examples/fibonacci/index.js
@@ -1,6 +1,6 @@
 'use strict'
 
-const {ensureAsync, waterfall, whilst} = require('async')
+const { ensureAsync, waterfall, whilst } = require('async')
 const mutexify = require('mutexify')
 
 const memo = [0, 1]
@@ -13,25 +13,32 @@ const fibonacciMemo = function (n) {
   return result
 }
 
-const fibonacci = num => num <= 1 ? 1 : fibonacci(num - 1) + fibonacci(num - 2)
+const fibonacci = num =>
+  num <= 1 ? 1 : fibonacci(num - 1) + fibonacci(num - 2)
 
 const lock = mutexify()
 let index = 0
 
 module.exports = function (opts, cb) {
-  const {worker: workerNum, memo, n} = opts
+  const { worker: workerNum, memo, n } = opts
   const fn = memo ? fibonacciMemo : fibonacci
 
   whilst(
     () => index < n,
-    done => waterfall([
-      next => lock(release => release(next(null, ++index))),
-      ensureAsync((num, next) => {
-        const value = fn(num)
-        console.log(`#${workerNum} fibonacci value=${index} result=${value}`)
-        return next()
-      })
-    ], done),
+    done =>
+      waterfall(
+        [
+          next => lock(release => release(next(null, ++index))),
+          ensureAsync((num, next) => {
+            const value = fn(num)
+            console.log(
+              `#${workerNum} fibonacci value=${index} result=${value}`
+            )
+            return next()
+          })
+        ],
+        done
+      ),
     cb
   )
 }
diff --git a/package.json b/package.json
index af648f3..c415d27 100644
--- a/package.json
+++ b/package.json
@@ -27,12 +27,12 @@
     "worker"
   ],
   "dependencies": {
-    "debug": "~3.1.0",
+    "debug": "~4.1.1",
     "exists-file": "~3.0.2",
     "is-directory": "~0.3.1",
     "is-file": "~1.0.0",
     "meow": "~5.0.0",
-    "run-series": "~1.1.4",
+    "run-series": "~1.1.8",
     "update-notifier": "~2.5.0",
     "worker-farm": "~1.6.0"
   },
diff --git a/test/parse-argv-spec.js b/test/parse-argv-spec.js
index 19b858d..e42ad78 100644
--- a/test/parse-argv-spec.js
+++ b/test/parse-argv-spec.js
@@ -6,13 +6,13 @@ const parseArgv = require('../bin/parse-args')
 describe('parse args', function () {
   it('farm opts', function () {
     const argv = ['-w', '1', 'examples/basic', '--test']
-    const {farm: farmConfig} = parseArgv(argv)
+    const { farm: farmConfig } = parseArgv(argv)
     should(farmConfig).be.eql(['-w', '1', 'examples/basic'])
   })
 
   it('file opts', function () {
     const argv = ['-w', '1', 'examples/basic', '--test']
-    const {file: fileConfig} = parseArgv(argv)
+    const { file: fileConfig } = parseArgv(argv)
     should(fileConfig).be.eql(['--test'])
   })
 })