diff --git a/README.md b/README.md
index 9fa8cbc..ff8f085 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,8 @@
 <p align="center">
-  <img src="https://i.imgur.com/JaXEFNp.png" width="300" height="300" alt="unfetch">
+  <img src="https://i.imgur.com/0cSIPzP.png" width="300" height="300" alt="unfetch">
   <br>
   <a href="https://www.npmjs.org/package/unfetch"><img src="https://img.shields.io/npm/v/unfetch.svg?style=flat" alt="npm"></a>
-  <a href="https://cdn.jsdelivr.net/npm/unfetch/dist/unfetch.umd.js"><img src="http://img.badgesize.io/https://cdn.jsdelivr.net/npm/unfetch/dist/unfetch.umd.js?compression=gzip" alt="gzip size"></a>
-  <a href="https://packagephobia.now.sh/result?p=unfetch"><img src="https://packagephobia.now.sh/badge?p=unfetch" alt="install size"></a>
+  <a href="https://unpkg.com/unfetch/polyfill"><img src="https://img.badgesize.io/https://unpkg.com/unfetch/polyfill/index.js?compression=gzip" alt="gzip size"></a>
   <a href="https://www.npmjs.com/package/unfetch"><img src="https://img.shields.io/npm/dt/unfetch.svg" alt="downloads" ></a>
   <a href="https://travis-ci.org/developit/unfetch"><img src="https://travis-ci.org/developit/unfetch.svg?branch=master" alt="travis"></a>
 </p>
diff --git a/package.json b/package.json
index 7d60897..0c15e56 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "unfetch",
-  "version": "3.1.1",
+  "version": "3.1.2",
   "description": "Bare minimum fetch polyfill in 500 bytes",
   "unpkg": "dist/unfetch.umd.js",
   "main": "dist/unfetch.js",
diff --git a/src/index.d.ts b/src/index.d.ts
index 0c53ad9..4a2ecdd 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -14,4 +14,4 @@ declare namespace unfetch {
 
 declare const unfetch: typeof fetch;
 
-export default unfetch;
+export = unfetch;
diff --git a/src/index.js b/src/index.js
index 934c7ce..e5f4f4c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -17,7 +17,7 @@ export default typeof fetch=='function' ? fetch.bind() : function(url, options)
 
 		request.onerror = reject;
 
-		request.send(options.body);
+		request.send(options.body || null);
 
 		function response() {
 			let keys = [],