diff --git a/package.json b/package.json
index 2a7f9f9..79fc21d 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "nodemailer-base64-to-s3",
   "description": "Convert your Base64-Encoded Data URI's in <img> tags to Amazon S3/CloudFront URL's",
-  "version": "3.0.2",
+  "version": "4.0.0",
   "author": "Nick Baugh <niftylettuce@gmail.com> (http://niftylettuce.com/)",
   "ava": {
     "failFast": true,