diff --git a/package-lock.json b/package-lock.json
index b1134fa..319a615 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "node-opcua-crypto",
-  "version": "3.1.0",
+  "version": "4.0.0-beta.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "node-opcua-crypto",
-      "version": "3.1.0",
+      "version": "4.0.0-beta.0",
       "license": "MIT",
       "dependencies": {
         "@peculiar/webcrypto": "^1.4.3",
diff --git a/package.json b/package.json
index 4fd548c..7dd9ac8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "node-opcua-crypto",
-  "version": "3.1.0",
+  "version": "4.0.0-beta.0",
   "description": "Crypto tools for Node-OPCUA",
   "main": "./index.js",
   "types": "./index.d.ts",