diff --git a/package.json b/package.json
index 9059df6..56f841c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rehype-retext",
-  "version": "3.0.2",
+  "version": "4.0.0",
   "description": "rehype plugin to transform to retext",
   "license": "MIT",
   "keywords": [
diff --git a/readme.md b/readme.md
index f367ae0..6e1457e 100644
--- a/readme.md
+++ b/readme.md
@@ -66,14 +66,14 @@ npm install rehype-retext
 In Deno with [`esm.sh`][esmsh]:
 
 ```js
-import rehypeRetext from 'https://esm.sh/rehype-retext@3'
+import rehypeRetext from 'https://esm.sh/rehype-retext@4'
 ```
 
 In browsers with [`esm.sh`][esmsh]:
 
 ```html
 <script type="module">
-  import rehypeRetext from 'https://esm.sh/rehype-retext@3?bundle'
+  import rehypeRetext from 'https://esm.sh/rehype-retext@4?bundle'
 </script>
 ```