diff --git a/.travis.yml b/.travis.yml
index 9f2bbd7..5345ac4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,15 +4,17 @@ before_install:
   - npm install npm -g
 node_js:
   - "6"
-  - "7"
   - "8"
-  - "9"
   - "10"
+  - "12"
+  - "14"
+  - lts/*
+  - current
 matrix:
   include:
-    - node_js: "8"
+    - node_js: "12"
       env: TEST_SUITE=coverage
-    - node_js: "8"
+    - node_js: "12"
       env: TEST_SUITE=lint
 env:
   - TEST_SUITE=test
diff --git a/lib/async.js b/lib/async.js
index 085142b..8383224 100644
--- a/lib/async.js
+++ b/lib/async.js
@@ -6,15 +6,15 @@ var Buffer = require('safe-buffer').Buffer
 var ZERO_BUF
 var subtle = global.crypto && global.crypto.subtle
 var toBrowser = {
-  'sha': 'SHA-1',
+  sha: 'SHA-1',
   'sha-1': 'SHA-1',
-  'sha1': 'SHA-1',
-  'sha256': 'SHA-256',
+  sha1: 'SHA-1',
+  sha256: 'SHA-256',
   'sha-256': 'SHA-256',
-  'sha384': 'SHA-384',
+  sha384: 'SHA-384',
   'sha-384': 'SHA-384',
   'sha-512': 'SHA-512',
-  'sha512': 'SHA-512'
+  sha512: 'SHA-512'
 }
 var checks = []
 function checkNative (algo) {
diff --git a/lib/default-encoding.js b/lib/default-encoding.js
index 420ffd1..4404fd2 100644
--- a/lib/default-encoding.js
+++ b/lib/default-encoding.js
@@ -9,4 +9,4 @@ if (process.browser) {
 } else {
   defaultEncoding = 'utf-8'
 }
-module.exports = defaultEncoding
\ No newline at end of file
+module.exports = defaultEncoding
diff --git a/test/index.js b/test/index.js
index b565310..04c8be1 100644
--- a/test/index.js
+++ b/test/index.js
@@ -10,68 +10,68 @@ var pVersionMajor = parseInt(process.version.split('.')[0].slice(1), 10)
 /* istanbul ignore next */
 if (pVersionMajor !== 4 || process.browser) {
   fixtures.invalid.push({
-    'key': 'password',
-    'salt': 'salt',
-    'iterations': 1,
-    'dkLen': -1,
-    'exception': 'Bad key length'
+    key: 'password',
+    salt: 'salt',
+    iterations: 1,
+    dkLen: -1,
+    exception: 'Bad key length'
   }, {
-    'key': 'password',
-    'salt': 'salt',
-    'iterations': 1,
-    'dkLen': 4073741824,
-    'exception': 'Bad key length'
+    key: 'password',
+    salt: 'salt',
+    iterations: 1,
+    dkLen: 4073741824,
+    exception: 'Bad key length'
   })
 }
 /* istanbul ignore next */
 if (pVersionMajor >= 5 || process.browser) {
   fixtures.invalid.push({
-    'key': 'password',
-    'salt': 'salt',
-    'iterations': 1,
-    'dkLen': NaN,
-    'exception': 'Bad key length'
+    key: 'password',
+    salt: 'salt',
+    iterations: 1,
+    dkLen: NaN,
+    exception: 'Bad key length'
   }, {
-    'key': 'password',
-    'salt': 'salt',
-    'iterations': 1,
-    'dkLen': Infinity,
-    'exception': 'Bad key length'
+    key: 'password',
+    salt: 'salt',
+    iterations: 1,
+    dkLen: Infinity,
+    exception: 'Bad key length'
   })
 }
 /* istanbul ignore next */
 if (pVersionMajor >= 6 || process.browser) {
   fixtures.valid.push({
-    'description': 'Unicode salt, no truncation',
-    'key': 'abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about',
-    'salt': 'mnemonicメートルガバヴァぱばぐゞちぢ十人十色',
-    'iterations': 2048,
-    'dkLen': 64,
-    'results': {
-      'sha1': '7e042a2f41ba17e2235fbc794e22a150816b0f54a1dfe113919fccb7a056066a109385e538f183c92bad896ae8b7d8e0f4cd66df359c77c8c7785cd1001c9a2c',
-      'sha256': '0b57118f2b6b079d9371c94da3a8315c3ada87a1e819b40c4c4e90b36ff2d3c8fd7555538b5119ac4d3da7844aa4259d92f9dd2188e78ac33c4b08d8e6b5964b',
-      'sha512': 'ba553eedefe76e67e2602dc20184c564010859faada929a090dd2c57aacb204ceefd15404ab50ef3e8dbeae5195aeae64b0def4d2eead1cdc728a33ced520ffd',
-      'sha224': 'd76474c525616ce2a527d23df8d6f6fcc4251cc3535cae4e955810a51ead1ec6acbe9c9619187ca5a3c4fd636de5b5fe58d031714731290bbc081dbf0fcb8fc1',
-      'sha384': '15010450f456769467e834db7fa93dd9d353e8bb733b63b0621090f96599ac3316908eb64ac9366094f0787cd4bfb2fea25be41dc271a19309710db6144f9b34',
-      'ripemd160': '255321c22a32f41ed925032043e01afe9cacf05470c6506621782c9d768df03c74cb3fe14a4296feba4c2825e736486fb3871e948f9c413ca006cc20b7ff6d37'
+    description: 'Unicode salt, no truncation',
+    key: 'abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about',
+    salt: 'mnemonicメートルガバヴァぱばぐゞちぢ十人十色',
+    iterations: 2048,
+    dkLen: 64,
+    results: {
+      sha1: '7e042a2f41ba17e2235fbc794e22a150816b0f54a1dfe113919fccb7a056066a109385e538f183c92bad896ae8b7d8e0f4cd66df359c77c8c7785cd1001c9a2c',
+      sha256: '0b57118f2b6b079d9371c94da3a8315c3ada87a1e819b40c4c4e90b36ff2d3c8fd7555538b5119ac4d3da7844aa4259d92f9dd2188e78ac33c4b08d8e6b5964b',
+      sha512: 'ba553eedefe76e67e2602dc20184c564010859faada929a090dd2c57aacb204ceefd15404ab50ef3e8dbeae5195aeae64b0def4d2eead1cdc728a33ced520ffd',
+      sha224: 'd76474c525616ce2a527d23df8d6f6fcc4251cc3535cae4e955810a51ead1ec6acbe9c9619187ca5a3c4fd636de5b5fe58d031714731290bbc081dbf0fcb8fc1',
+      sha384: '15010450f456769467e834db7fa93dd9d353e8bb733b63b0621090f96599ac3316908eb64ac9366094f0787cd4bfb2fea25be41dc271a19309710db6144f9b34',
+      ripemd160: '255321c22a32f41ed925032043e01afe9cacf05470c6506621782c9d768df03c74cb3fe14a4296feba4c2825e736486fb3871e948f9c413ca006cc20b7ff6d37'
     }
   })
 
 // 'binary' behaviour, Node 6 defaulted to 'utf-8'
 } else {
   fixtures.valid.push({
-    'description': 'Unicode salt, suffers from truncation',
-    'key': 'abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about',
-    'salt': 'mnemonicメートルガバヴァぱばぐゞちぢ十人十色',
-    'iterations': 2048,
-    'dkLen': 64,
-    'results': {
-      'sha1': 'd85d14adcb7bdb5d976160e504f520a98cf71aca4cd5fceadf37759743bd6e1d2ff78bdd4403552aef7658094384b341ede80fffd334182be076f9d988a0a40f',
-      'sha256': 'b86b5b900c29ed2724359afd793e10ffc1eb0e7d6f624fc9c85b8ac1785d9a2f0575af52a2338e611f2e6cffdee544adfff6f3d4f43be2ba0e2bd7e917b38a14',
-      'sha512': '3a863fa00f2e97a83fa9b18805e0047a6282cbae0ff48438b33a14475771c52d05137daa12e364cb34d84547ac07568b801c5c7f8dd4baaeee18a67a5c6a3377',
-      'sha224': '95727793842437774ad9ae27b8154a6f37f208b75a03d3a4d4a2443422bb6bc85efcfa92aa4376926ea89a8f5a63118eecdb58c8ca28ab31007da79437e0a1ef',
-      'sha384': '1a7e02e8ba0e357269a55642024b85738b95238d6cdc49bc440204995aefeff499e22cba76d4c7e96b7d4a9596a70e744f53fa94f3547e7dc506fcaf16ceb4a2',
-      'ripemd160': 'bac7849db13e90604620945695288ffee20369107c3a6632d6b1d6b926175ac914319b5a742e6b1a37b82841b6f010ad47ebdb5cd608026eb48513bf68cb54f5'
+    description: 'Unicode salt, suffers from truncation',
+    key: 'abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about',
+    salt: 'mnemonicメートルガバヴァぱばぐゞちぢ十人十色',
+    iterations: 2048,
+    dkLen: 64,
+    results: {
+      sha1: 'd85d14adcb7bdb5d976160e504f520a98cf71aca4cd5fceadf37759743bd6e1d2ff78bdd4403552aef7658094384b341ede80fffd334182be076f9d988a0a40f',
+      sha256: 'b86b5b900c29ed2724359afd793e10ffc1eb0e7d6f624fc9c85b8ac1785d9a2f0575af52a2338e611f2e6cffdee544adfff6f3d4f43be2ba0e2bd7e917b38a14',
+      sha512: '3a863fa00f2e97a83fa9b18805e0047a6282cbae0ff48438b33a14475771c52d05137daa12e364cb34d84547ac07568b801c5c7f8dd4baaeee18a67a5c6a3377',
+      sha224: '95727793842437774ad9ae27b8154a6f37f208b75a03d3a4d4a2443422bb6bc85efcfa92aa4376926ea89a8f5a63118eecdb58c8ca28ab31007da79437e0a1ef',
+      sha384: '1a7e02e8ba0e357269a55642024b85738b95238d6cdc49bc440204995aefeff499e22cba76d4c7e96b7d4a9596a70e744f53fa94f3547e7dc506fcaf16ceb4a2',
+      ripemd160: 'bac7849db13e90604620945695288ffee20369107c3a6632d6b1d6b926175ac914319b5a742e6b1a37b82841b6f010ad47ebdb5cd608026eb48513bf68cb54f5'
     }
   })
 }