diff --git a/package.json b/package.json
index 5a1b637..b50a9ce 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "level",
   "description": "Fast & simple storage - a Node.js-style LevelDB wrapper (a convenience package bundling LevelUP & LevelDOWN)",
-  "version": "3.0.1",
+  "version": "4.0.0",
   "contributors": [
     "Rod Vagg <r@va.gg> (https://github.com/rvagg)",
     "John Chesley <john@chesl.es> (https://github.com/chesles/)",