diff --git a/.npmrc b/.npmrc
new file mode 100644
index 0000000..b6f27f1
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+engine-strict=true
diff --git a/README.md b/README.md
index a1a1b17..13fc25e 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![npm version](https://img.shields.io/npm/v/htaccess-punk.svg)](https://www.npmjs.com/package/htaccess-punk) [![Build status](https://github.com/j9t/htaccess-punk/workflows/Tests/badge.svg)](https://github.com/j9t/htaccess-punk/actions) [![Socket](https://badge.socket.dev/npm/package/htaccess-punk)](https://socket.dev/npm/package/htaccess-punk)
 
-.htaccess Punk checks the redirect targets defined in `.htaccess` files. It follows redirect chains to verify where they ultimately resolve and what HTTP status they return, thus helping to fight redirect rot.
+.htaccess Punk checks the redirect targets defined in `.htaccess` files. It follows redirect chains to verify where they ultimately resolve and what HTTP status they return, thus helping to fight redirect rot. It requires Node v14+.
 
 ## Usage
 
@@ -59,4 +59,4 @@ await check(dir, {
 4. **deduplicates** targets across all files
 5. **checks** each unique URL with a HEAD request (falling back to GET if the server returns 403 or 405), following redirect chains up to 10 hops, and reports the final HTTP status
 
-The `check()` function returns raw result data. The CLI (`bin/htaccess-punk.js`) collects those results and prints them grouped by `.htaccess` file, with the final status color-coded: green for 2xx, yellow for 3xx (further redirect from the final hop, e.g. a loop or exceeded redirect limit), red for 4xx/5xx. When a target redirected before settling, the final URL is shown below it.
\ No newline at end of file
+The `check()` function returns raw result data. The CLI (`bin/htaccess-punk.js`) collects those results and prints them grouped by `.htaccess` file, with the final status color-coded: green for 2xx, yellow for 3xx (further redirect from the final hop, e.g. a loop or exceeded redirect limit), red for 4xx/5xx. When a target redirected before settling, the final URL is shown below it.
diff --git a/package.json b/package.json
index 92b190b..a900377 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,9 @@
     "htaccess-punk": "bin/htaccess-punk.js"
   },
   "description": "Redirect checker for .htaccess files",
+  "engines" : { 
+    "node" : ">=14.0.0"
+  },
   "exports": {
     ".": "./src/index.js"
   },