diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 930cf0f..7fa4012 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "3.0.3"
+  ".": "4.0.0-alpha"
 }
diff --git a/HISTORY.md b/HISTORY.md
index e73d251..6350e49 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -2,6 +2,17 @@
 
 All notable changes to this project will be documented in this file.
 
+## [4.0.0-alpha](https://github.com/mongodb-js/mongodb-connection-string-url/compare/v3.0.3...v4.0.0-alpha) (2025-10-21)
+
+
+### ⚠ BREAKING CHANGES
+
+* **NODE-7058:** drop support for Node 16 and 18 ([#95](https://github.com/mongodb-js/mongodb-connection-string-url/issues/95))
+
+### Features
+
+* **NODE-7058:** drop support for Node 16 and 18 ([#95](https://github.com/mongodb-js/mongodb-connection-string-url/issues/95)) ([783c85b](https://github.com/mongodb-js/mongodb-connection-string-url/commit/783c85b5416410fc92c1121d60f8b95e822465a0))
+
 ## [3.0.3](https://github.com/mongodb-js/mongodb-connection-string-url/compare/v3.0.2...v3.0.3) (2025-09-04)
 
 
diff --git a/package-lock.json b/package-lock.json
index aa7b89c..c75dbfc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mongodb-connection-string-url",
-  "version": "3.0.3",
+  "version": "4.0.0-alpha",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mongodb-connection-string-url",
-      "version": "3.0.3",
+      "version": "4.0.0-alpha",
       "license": "Apache-2.0",
       "dependencies": {
         "@types/whatwg-url": "^13.0.0",
diff --git a/package.json b/package.json
index 2682421..04e7ce0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mongodb-connection-string-url",
-  "version": "3.0.3",
+  "version": "4.0.0-alpha",
   "description": "MongoDB connection strings, based on the WhatWG URL API",
   "keywords": [
     "password",