diff --git a/package-lock.json b/package-lock.json
index 76e2e12..cbaecf5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "tocbot",
-  "version": "4.27.20",
+  "version": "4.28.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "tocbot",
-      "version": "4.27.20",
+      "version": "4.28.0",
       "license": "MIT",
       "devDependencies": {
         "@babel/cli": "^7.19.3",
diff --git a/package.json b/package.json
index f8a169f..a9bbe19 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tocbot",
-  "version": "4.27.20",
+  "version": "4.28.0",
   "description": "Generate a table of contents based on the heading structure of a html document.",
   "main": "./dist/tocbot.js",
   "module": "./index.js",