diff --git a/lib/cache.js b/lib/cache.js
index 4d297cf9..5a9d92ee 100644
--- a/lib/cache.js
+++ b/lib/cache.js
@@ -1,5 +1,5 @@
 // Packages
-const fetch = require('node-fetch')
+const fetch = require('cross-fetch')
 const retry = require('async-retry')
 const convertStream = require('stream-to-string')
 const ms = require('ms')
diff --git a/lib/index.js b/lib/index.js
index 631abb7a..4ca9ca8a 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -4,7 +4,7 @@ const finalhandler = require('finalhandler')
 const Cache = require('./cache')
 
 module.exports = config => {
-  const router = Router()
+  const router = config.router ? config.router() : Router()
   let cache = null;
 
   try {
diff --git a/package.json b/package.json
index cb03f66c..2dd778a0 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,7 @@
     "micro": "9.3.3",
     "ms": "2.1.1",
     "node-fetch": "2.0.0",
+    "cross-fetch": "^3.0.6",
     "router": "1.3.2",
     "semver": "5.5.0",
     "stream-to-string": "1.1.0",