diff --git a/package.json b/package.json
index 0d8d9b6..be26718 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
     "name": "casper",
     "description": "A clean, minimal default theme for the Ghost publishing platform",
     "demo": "https://demo.ghost.io",
-    "version": "3.1.2",
+    "version": "4.0.0-rc.0",
     "engines": {
         "ghost": ">=4.0.0",
         "ghost-api": "v4"