diff --git a/README.md b/README.md
index 6a04dd3f..2cba65dc 100644
--- a/README.md
+++ b/README.md
@@ -40,11 +40,6 @@ plugins:
       entryPoints:
         - '*.html'
 
-      # canonicalRoot is the origin where your page will eventually be deployed
-      # Setting canonicalRoot will enable checklinks to map canonical URL's to your
-      # page in your code to local files on disk
-      canonicalRoot: https://your-page.netlify.com
-
       # Recurse through all the links and asset references on your page, starting
       # at the entrypoints
       recursive: true
diff --git a/lib/config.schema.json b/lib/config.schema.json
index 155ec8d2..e27eb10f 100644
--- a/lib/config.schema.json
+++ b/lib/config.schema.json
@@ -2,12 +2,6 @@
   "type": "object",
   "additionalProperties": false,
   "properties": {
-    "canonicalRoot": {
-      "title": "Canonical root",
-      "description": "Setting canonicalRoot will enable subfont to map canonical URL's to your page in your code to local files on disk",
-      "type": "string",
-      "format": "uri"
-    },
     "entryPoints": {
       "title": "Entry points",
       "description": "An array of glob patterns for pages on your site. Recursive traversal will start from these",
diff --git a/lib/index.js b/lib/index.js
index f72ced24..c33dbbc6 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -4,6 +4,8 @@ const spot = require('tap-spot');
 const configSchema = require('./config.schema.json');
 const globby = require('globby');
 
+const canonicalRoot = process.env.URL;
+
 module.exports = {
   name: 'checklinks',
 
@@ -47,6 +49,7 @@ module.exports = {
       {
         inputUrls: globby.sync(entryPoints, { cwd: root }),
         ...defaultConfig,
+        canonicalRoot,
         root,
         skipFilter,
         todoFilter,