diff --git a/package-lock.json b/package-lock.json
index 5b76712..e171011 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@x-govuk/marked-govspeak",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@x-govuk/marked-govspeak",
-      "version": "0.3.0",
+      "version": "0.4.0",
       "license": "MIT",
       "dependencies": {
         "marked": "^15.0.0"
diff --git a/package.json b/package.json
index bc966f8..824e174 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@x-govuk/marked-govspeak",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Govspeak Markdown extensions for Marked.",
   "keywords": [
     "govuk",