diff --git a/package.json b/package.json
index a9ccf37..a44ef25 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jsbi",
-  "version": "3.2.5",
+  "version": "4.0.0",
   "repository": "GoogleChromeLabs/jsbi",
   "devDependencies": {
     "@babel/preset-env": "^7.5.5",