diff --git a/package.json b/package.json
index b206066..fa00c74 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "micromark-extension-frontmatter",
-  "version": "1.1.1",
+  "version": "2.0.0",
   "description": "micromark extension to support frontmatter (YAML, TOML, etc)",
   "license": "MIT",
   "keywords": [
diff --git a/readme.md b/readme.md
index 43b454f..62a1aac 100644
--- a/readme.md
+++ b/readme.md
@@ -73,14 +73,14 @@ npm install micromark-extension-frontmatter
 In Deno with [`esm.sh`][esmsh]:
 
 ```js
-import {frontmatter, frontmatterHtml} from 'https://esm.sh/micromark-extension-frontmatter@1'
+import {frontmatter, frontmatterHtml} from 'https://esm.sh/micromark-extension-frontmatter@2'
 ```
 
 In browsers with [`esm.sh`][esmsh]:
 
 ```html
 <script type="module">
-  import {frontmatter, frontmatterHtml} from 'https://esm.sh/micromark-extension-frontmatter@1?bundle'
+  import {frontmatter, frontmatterHtml} from 'https://esm.sh/micromark-extension-frontmatter@2?bundle'
 </script>
 ```