diff --git a/package-lock.json b/package-lock.json
index 8794ebdc..02e65002 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "ecmarkup",
-	"version": "19.1.0",
+	"version": "20.0.0",
 	"lockfileVersion": 2,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "ecmarkup",
-			"version": "19.1.0",
+			"version": "20.0.0",
 			"license": "MIT",
 			"dependencies": {
 				"chalk": "^4.1.2",
diff --git a/package.json b/package.json
index b0400eb6..2e73cc3c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "ecmarkup",
-	"version": "19.1.0",
+	"version": "20.0.0",
 	"description": "Custom element definitions and core utilities for markup that specifies ECMAScript and related technologies.",
 	"main": "lib/ecmarkup.js",
 	"typings": "lib/ecmarkup.d.ts",