diff --git a/package.json b/package.json
index 9244bbff13..2c24c215ba 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mocha",
-  "version": "3.5.3",
+  "version": "4.0.0",
   "description": "simple, flexible, fun test framework",
   "keywords": [
     "mocha",