diff --git a/app/scripts/lib/local-store.js b/app/scripts/lib/local-store.js
index 1cf00dd30..5b47985f6 100644
--- a/app/scripts/lib/local-store.js
+++ b/app/scripts/lib/local-store.js
@@ -3,7 +3,6 @@
 // https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/storage/local
 
 const extension = require('extensionizer')
-const { promisify } = require('util')
 
 module.exports = class ExtensionStore {
   constructor() {
@@ -11,9 +10,6 @@ module.exports = class ExtensionStore {
     if (!this.isSupported) {
       log.error('Storage local API not available.')
     }
-    const local = extension.storage.local
-    this._get = promisify(local.get).bind(local)
-    this._set = promisify(local.set).bind(local)
   }
 
   async get() {
@@ -31,6 +27,34 @@ module.exports = class ExtensionStore {
   async set(state) {
     return this._set(state)
   }
+
+  _get() {
+    const local = extension.storage.local
+    return new Promise((resolve, reject) => {
+      local.get(null, (result) => {
+        const err = extension.runtime.lastError
+        if (err) {
+          reject(err)
+        } else {
+          resolve(result)
+        }
+      })
+    })
+  }
+
+  _set(obj) {
+    const local = extension.storage.local
+    return new Promise((resolve, reject) => {
+      local.set(obj, () => {
+        const err = extension.runtime.lastError
+        if (err) {
+          reject(err)
+        } else {
+          resolve()
+        }
+      })
+    })
+  }
 }
 
 function isEmpty(obj) {
diff --git a/development/genStates.js b/development/genStates.js
index d92e2bc2e..bc274c757 100644
--- a/development/genStates.js
+++ b/development/genStates.js
@@ -1,6 +1,6 @@
 const fs = require('fs')
 const path = require('path')
-const { promisify } = require('util')
+const promisify = require('pify')
 
 start().catch(console.error)
 
diff --git a/development/run-version-bump.js b/development/run-version-bump.js
index fde14566e..98757f58e 100644
--- a/development/run-version-bump.js
+++ b/development/run-version-bump.js
@@ -1,4 +1,4 @@
-const { promisify } = require('util')
+const promisify = require('pify')
 const fs = require('fs')
 const readFile = promisify(fs.readFile)
 const writeFile = promisify(fs.writeFile)
diff --git a/test/unit/development/version–bump-test.js b/test/unit/development/version–bump-test.js
index 1c445c8b4..5e37d4410 100644
--- a/test/unit/development/version–bump-test.js
+++ b/test/unit/development/version–bump-test.js
@@ -1,6 +1,6 @@
 const assert = require('assert')
 const versionBump = require('../../../development/version-bump')
-const { promisify } = require('util')
+const promisify = require('pify')
 const fs = require('fs')
 const readFile = promisify(fs.readFile)
 const path = require('path')
@@ -41,5 +41,3 @@ describe('version bumper', function () {
     assert.ok(result.changelog.includes(expected))
   })
 })
-
-