diff --git a/CHANGELOG.md b/CHANGELOG.md
index 60b7f7d7..f84f0128 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
 # Change Log
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## 4.0
+* Removed CommonJS support. Nano ID 4 will work only with ESM applications.
+  We will support 3.x branch with CommonJS for users who can’t migrate to ESM.
+* Removed Node.js 10 and Node.js 12 support.
+* Reduced npm package size.
+
 ## 3.3.4
 * Fixed `--help` in CLI (by @Lete114).
 
diff --git a/package.json b/package.json
index 0e59df1b..bd1fd422 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "nanoid",
-  "version": "3.3.4",
+  "version": "4.0.0",
   "description": "A tiny (116 bytes), secure URL-friendly unique string ID generator",
   "keywords": [
     "uuid",