diff --git a/package.json b/package.json
index e6a11ee..af144ee 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mdast-util-heading-style",
-  "version": "2.0.1",
+  "version": "3.0.0",
   "description": "mdast utility to get the style of a heading",
   "license": "MIT",
   "keywords": [
diff --git a/readme.md b/readme.md
index d6d9be5..5c256bf 100644
--- a/readme.md
+++ b/readme.md
@@ -55,14 +55,14 @@ npm install mdast-util-heading-style
 In Deno with [`esm.sh`][esmsh]:
 
 ```js
-import {headingStyle} from 'https://esm.sh/mdast-util-heading-style@2'
+import {headingStyle} from 'https://esm.sh/mdast-util-heading-style@3'
 ```
 
 In browsers with [`esm.sh`][esmsh]:
 
 ```html
 <script type="module">
-  import {headingStyle} from 'https://esm.sh/mdast-util-heading-style@2?bundle'
+  import {headingStyle} from 'https://esm.sh/mdast-util-heading-style@3?bundle'
 </script>
 ```