diff --git a/package-lock.json b/package-lock.json
index ba99a6f..ad508d4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "structured-headers",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "structured-headers",
-      "version": "0.3.0",
+      "version": "0.4.0",
       "license": "MIT",
       "devDependencies": {
         "@types/node": "^12.20.13",
diff --git a/package.json b/package.json
index 03e4849..e9bd418 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "structured-headers",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Implementation of draft-ietf-httpbis-header-structure, structured headers for HTTP.",
   "main": "index.js",
   "scripts": {