diff --git a/package.json b/package.json
index 28ed529..3d6661b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "chai-immutable",
-  "version": "1.6.0",
+  "version": "2.0.0-rc.1",
   "description": "Chai assertions for Facebook's Immutable library for JavaScript collections",
   "main": "chai-immutable.js",
   "directories": {