diff --git a/lib/request.js b/lib/request.js
index b1f9fc0..6002da6 100644
--- a/lib/request.js
+++ b/lib/request.js
@@ -37,7 +37,9 @@ export default class Request {
   }
 
   async buffer(url, options = {}) {
-    return this.fetch(url, options).then(res => res.buffer());
+    const res = await this.fetch(url, options);
+    const buffer = await res.arrayBuffer();
+    return Buffer.from(buffer);
   }
 
   async text(url, options = {}) {