diff --git a/lib/json/__tests__/output-json-sync.test.js b/lib/json/__tests__/output-json-sync.test.js
index 671fe792..935a824f 100644
--- a/lib/json/__tests__/output-json-sync.test.js
+++ b/lib/json/__tests__/output-json-sync.test.js
@@ -5,7 +5,6 @@ const os = require('os')
 const fse = require(process.cwd())
 const path = require('path')
 const assert = require('assert')
-const outputJsonSync = require('../output-json-sync')
 
 /* global beforeEach, describe, it */
 
@@ -23,7 +22,7 @@ describe('json', () => {
       assert(!fs.existsSync(file))
 
       const data = { name: 'JP' }
-      outputJsonSync(file, data)
+      fse.outputJsonSync(file, data)
 
       assert(fs.existsSync(file))
       const newData = JSON.parse(fs.readFileSync(file, 'utf8'))
@@ -39,7 +38,7 @@ describe('json', () => {
         const replacer = (k, v) => v === 'JP' ? 'Jon Paul' : v
         const data = { name: 'JP' }
 
-        outputJsonSync(file, data, { replacer })
+        fse.outputJsonSync(file, data, { replacer })
         const newData = JSON.parse(fs.readFileSync(file, 'utf8'))
 
         assert.strictEqual(newData.name, 'Jon Paul')
diff --git a/lib/json/__tests__/output-json.test.js b/lib/json/__tests__/output-json.test.js
index c98370be..6a5de69f 100644
--- a/lib/json/__tests__/output-json.test.js
+++ b/lib/json/__tests__/output-json.test.js
@@ -5,7 +5,6 @@ const os = require('os')
 const fse = require(process.cwd())
 const path = require('path')
 const assert = require('assert')
-const outputJson = require('../output-json')
 
 /* global beforeEach, describe, it */
 
@@ -23,7 +22,7 @@ describe('json', () => {
       assert(!fs.existsSync(file))
 
       const data = { name: 'JP' }
-      outputJson(file, data, err => {
+      fse.outputJson(file, data, err => {
         if (err) return done(err)
 
         assert(fs.existsSync(file))
@@ -34,12 +33,32 @@ describe('json', () => {
       })
     })
 
+    it('should be mutation-proof', async () => {
+      const dir = path.join(TEST_DIR, 'this-dir', 'certanly-does-not', 'exist')
+      const file = path.join(dir, 'file.json')
+      assert(!fs.existsSync(dir), 'directory cannot exist')
+
+      const name = 'JP'
+      const data = { name }
+      const promise = fse.outputJson(file, data)
+      // Mutate data right after call
+      data.name = 'Ryan'
+      // now await for the call to finish
+      await promise
+
+      assert(fs.existsSync(file))
+      const newData = JSON.parse(fs.readFileSync(file, 'utf8'))
+
+      // mutation did not change data
+      assert.strictEqual(newData.name, name)
+    })
+
     it('should support Promises', () => {
       const file = path.join(TEST_DIR, 'this-dir', 'prob-does-not', 'exist', 'file.json')
       assert(!fs.existsSync(file))
 
       const data = { name: 'JP' }
-      return outputJson(file, data)
+      return fse.outputJson(file, data)
     })
 
     describe('> when an option is passed, like JSON replacer', () => {
@@ -50,7 +69,7 @@ describe('json', () => {
         const replacer = (k, v) => v === 'JP' ? 'Jon Paul' : v
         const data = { name: 'JP' }
 
-        outputJson(file, data, { replacer }, err => {
+        fse.outputJson(file, data, { replacer }, err => {
           assert.ifError(err)
           const newData = JSON.parse(fs.readFileSync(file, 'utf8'))
           assert.strictEqual(newData.name, 'Jon Paul')
diff --git a/lib/json/index.js b/lib/json/index.js
index bae68d45..900126ad 100644
--- a/lib/json/index.js
+++ b/lib/json/index.js
@@ -1,6 +1,6 @@
 'use strict'
 
-const u = require('universalify').fromCallback
+const u = require('universalify').fromPromise
 const jsonFile = require('./jsonfile')
 
 jsonFile.outputJson = u(require('./output-json'))
diff --git a/lib/json/jsonfile.js b/lib/json/jsonfile.js
index 59cdb3e4..f11d34d6 100644
--- a/lib/json/jsonfile.js
+++ b/lib/json/jsonfile.js
@@ -1,12 +1,11 @@
 'use strict'
 
-const u = require('universalify').fromCallback
 const jsonFile = require('jsonfile')
 
 module.exports = {
   // jsonfile exports
-  readJson: u(jsonFile.readFile),
+  readJson: jsonFile.readFile,
   readJsonSync: jsonFile.readFileSync,
-  writeJson: u(jsonFile.writeFile),
+  writeJson: jsonFile.writeFile,
   writeJsonSync: jsonFile.writeFileSync
 }
diff --git a/lib/json/output-json-sync.js b/lib/json/output-json-sync.js
index 6f76710e..f76b4744 100644
--- a/lib/json/output-json-sync.js
+++ b/lib/json/output-json-sync.js
@@ -1,18 +1,12 @@
 'use strict'
 
-const fs = require('graceful-fs')
-const path = require('path')
-const mkdir = require('../mkdirs')
-const jsonFile = require('./jsonfile')
+const { stringify } = require('jsonfile/utils')
+const { outputFileSync } = require('../output')
 
 function outputJsonSync (file, data, options) {
-  const dir = path.dirname(file)
+  const str = stringify(data, options)
 
-  if (!fs.existsSync(dir)) {
-    mkdir.mkdirsSync(dir)
-  }
-
-  jsonFile.writeJsonSync(file, data, options)
+  outputFileSync(file, str, options)
 }
 
 module.exports = outputJsonSync
diff --git a/lib/json/output-json.js b/lib/json/output-json.js
index d45edb89..0fc66897 100644
--- a/lib/json/output-json.js
+++ b/lib/json/output-json.js
@@ -1,27 +1,12 @@
 'use strict'
 
-const path = require('path')
-const mkdir = require('../mkdirs')
-const pathExists = require('../path-exists').pathExists
-const jsonFile = require('./jsonfile')
+const { stringify } = require('jsonfile/utils')
+const { outputFile } = require('../output')
 
-function outputJson (file, data, options, callback) {
-  if (typeof options === 'function') {
-    callback = options
-    options = {}
-  }
+async function outputJson (file, data, options = {}) {
+  const str = stringify(data, options)
 
-  const dir = path.dirname(file)
-
-  pathExists(dir, (err, itDoes) => {
-    if (err) return callback(err)
-    if (itDoes) return jsonFile.writeJson(file, data, options, callback)
-
-    mkdir.mkdirs(dir, err => {
-      if (err) return callback(err)
-      jsonFile.writeJson(file, data, options, callback)
-    })
-  })
+  await outputFile(file, str, options)
 }
 
 module.exports = outputJson
diff --git a/package.json b/package.json
index 26ff4590..97e3a9e9 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
   "dependencies": {
     "at-least-node": "^1.0.0",
     "graceful-fs": "^4.2.0",
-    "jsonfile": "^4.0.0",
+    "jsonfile": "^6.0.1",
     "universalify": "^1.0.0"
   },
   "devDependencies": {