diff --git a/package.json b/package.json
index e3e14ba1..c09dd50b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mr",
-  "version": "17.0.13",
+  "version": "18.0.0-rc1",
   "description": "A refresh-only CommonJS module system for browsers, used in Montage",
   "license": "BSD-3-Clause",
   "keywords": [
@@ -12,8 +12,8 @@
     "loader"
   ],
   "engines": {
-    "node": "<=4.9.1",
-    "npm": "<=2.15.11"
+    "node": ">=4",
+    "npm": ">=2"
   },
   "repository": {
     "type": "git",