diff --git a/packages/independent/md-up/package.json b/packages/independent/md-up/package.json
index 22815f9cb3..9cffc04235 100644
--- a/packages/independent/md-up/package.json
+++ b/packages/independent/md-up/package.json
@@ -2,6 +2,7 @@
   "name": "@jsenv/md-up",
   "version": "0.0.1",
   "license": "MIT",
+  "private": true,
   "repository": {
     "type": "git",
     "url": "https://github.com/jsenv/core",