diff --git a/src/index.js b/src/index.js
index 3c92214..7aa837a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -42,7 +42,7 @@ class NetlifyAPI {
   }
 
   get accessToken() {
-    return (get(this, 'defaultHeaders.Authorization') || '').replace('Bearer ', '')
+    return (get(this, 'defaultHeaders.Authorization') || '').replace('Bearer ', '') || null
   }
 
   set accessToken(token) {
diff --git a/src/open-api/index.js b/src/open-api/index.js
index 92885fa..859a5e2 100644
--- a/src/open-api/index.js
+++ b/src/open-api/index.js
@@ -2,8 +2,8 @@ const get = require('lodash.get')
 const set = require('lodash.set')
 const queryString = require('qs')
 const http = require('http')
-const fetch = require('node-fetch')
-const Headers = fetch.Headers
+const fetch = require('node-fetch').default || require('node-fetch') // Webpack will sometimes export default exports in different places
+const Headers = require('node-fetch').Headers
 const camelCase = require('lodash.camelcase')
 const { JSONHTTPError, TextHTTPError } = require('micro-api-client')
 const debug = require('debug')('netlify:open-api')