diff --git a/package.json b/package.json
index a5b3db7..c204390 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "remark-heading-gap",
-  "version": "5.0.1",
+  "version": "6.0.0",
   "description": "remark plugin to adjust the gap between headings",
   "license": "MIT",
   "keywords": [
diff --git a/readme.md b/readme.md
index 1781bad..a3d7fbb 100644
--- a/readme.md
+++ b/readme.md
@@ -58,14 +58,14 @@ npm install remark-heading-gap
 In Deno with [`esm.sh`][esmsh]:
 
 ```js
-import remarkHeadingGap from 'https://esm.sh/remark-heading-gap@5'
+import remarkHeadingGap from 'https://esm.sh/remark-heading-gap@6'
 ```
 
 In browsers with [`esm.sh`][esmsh]:
 
 ```html
 <script type="module">
-  import remarkHeadingGap from 'https://esm.sh/remark-heading-gap@5?bundle'
+  import remarkHeadingGap from 'https://esm.sh/remark-heading-gap@6?bundle'
 </script>
 ```