diff --git a/.nvmrc b/.nvmrc
index 7950a44..805b5a4 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-v18.17.0
+v20.9.0
diff --git a/package-lock.json b/package-lock.json
index 1a5e037..1b90c9c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,6 +11,9 @@
       "devDependencies": {
         "eslint": "^8.46.0",
         "microbundle": "^0.15.1"
+      },
+      "engines": {
+        "node": "20.9.0"
       }
     },
     "node_modules/@aashutoshrathi/word-wrap": {
diff --git a/package.json b/package.json
index 6a522cb..907eacd 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,10 @@
   "version": "1.0.0",
   "description": "A portable, embeddable version of the DO Community DNS Lookup tool.",
   "license": "Apache-2.0",
+  "private": true,
+  "engines": {
+    "node": "20.9.0"
+  },
   "main": "src/index.js",
   "publishConfig": {
     "source": "src/index.js",