diff --git a/package.json b/package.json
index 9a29127db..e621b18e2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash",
-  "version": "4.2.0",
+  "version": "4.2.1-pre",
   "main": "lodash.js",
   "private": true,
   "devDependencies": {