diff --git a/package.json b/package.json
index 22cd697..5eb88b3 100644
--- a/package.json
+++ b/package.json
@@ -80,15 +80,12 @@
     "watch:tsc": "tsc --project . --watch"
   },
   "dependencies": {
-    "@types/fs-extra": "0.0.37",
-    "@types/mz": "0.0.31",
     "@types/node": "7.0.14",
-    "@types/proxyquire": "1.3.27",
     "ajv": "5.0.0",
     "chromedriver": "2.29.0",
     "debug": "2.6.5",
     "deep-strict-equal": "0.2.0",
-    "fs-promise": "2.0.2",
+    "fs-extra": "3.0.0",
     "geckodriver": "1.6.1",
     "glob": "7.1.1",
     "selenium-webdriver": "3.4.0",
@@ -97,6 +94,7 @@
     "uuid": "3.0.1"
   },
   "devDependencies": {
+    "@types/proxyquire": "1.3.27",
     "ava": "0.19.1",
     "commitizen": "2.9.6",
     "conventional-changelog-lint": "1.1.9",
diff --git a/src/__tests__/browser.test.ts b/src/__tests__/browser.test.ts
index f00dda8..d26f070 100644
--- a/src/__tests__/browser.test.ts
+++ b/src/__tests__/browser.test.ts
@@ -11,7 +11,7 @@ proxyquire.noPreserveCache();
 proxyquire.preserveCache();
 
 proxyquire('../browser', {
-  'fs-promise': {outputFile: stubs.outputFile},
+  'fs-extra': {outputFile: stubs.outputFile},
   'uuid/v4': stubs.uuidV4,
   './utils': {sleep: stubs.sleep}
 });
diff --git a/src/browser.ts b/src/browser.ts
index 0006e20..a48f4a2 100644
--- a/src/browser.ts
+++ b/src/browser.ts
@@ -1,6 +1,6 @@
 import uuidV4 = require('uuid/v4');
 
-import {outputFile} from 'fs-promise';
+import {outputFile} from 'fs-extra';
 import {join} from 'path';
 import {Accessor} from './accessor';
 import {Action} from './action';
diff --git a/types/fs-extra.d.ts b/types/fs-extra.d.ts
new file mode 100644
index 0000000..e62424e
--- /dev/null
+++ b/types/fs-extra.d.ts
@@ -0,0 +1,12 @@
+// tslint:disable max-line-length promise-function-async
+
+declare module 'fs-extra' {
+  export interface Options {
+    readonly encoding?: string;
+    readonly flag?: string;
+    readonly mode?: number;
+  }
+
+  // https://github.com/jprichardson/node-fs-extra/blob/master/docs/outputFile.md
+  export function outputFile(file: string, data: string | Buffer, options?: Options): Promise<void>;
+}
diff --git a/types/index.d.ts b/types/index.d.ts
index 29706df..02f3c55 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -1,6 +1,7 @@
 /// <reference path="../types/ajv.d.ts" />
 /// <reference path="../types/debug.d.ts" />
 /// <reference path="../types/deep-strict-equal.d.ts" />
+/// <reference path="../types/fs-extra.d.ts" />
 /// <reference path="../types/glob.d.ts" />
 /// <reference path="../types/selenium-webdriver.d.ts" />
 /// <reference path="../types/sinon.d.ts" />