diff --git a/README.md b/README.md
index 74448d3..b397e07 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ Monaco Editor for React · use the [monaco-editor](https://microsoft.githu
 
 <hr />
 
-:tada: version `v4` is here - to see what's new in the new version and how to migrate from `v3`, please read this [doc](./v4.md)
+:tada: version `v4` is here - to see what's new in the new version and how to migrate from `v3`, please read this [doc](./v4.changes.md)
 <br />
 :tada: the new section [Development / Playground](#development-playground) has been created - now you can run the playground and play with the internals of the library
 <br />
diff --git a/package.json b/package.json
index 4b8595a..82d3ba4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@monaco-editor/react",
-  "version": "4.0.0-rc.2",
+  "version": "4.0.0",
   "description": "Monaco editor wrapper for easy/one-line integration with React applications (e.g. powered by create-react-app) without need of webpack configuration files",
   "author": "Suren Atoyan <contact@surenatoyan.com>",
   "main": "lib/cjs/index.js",
diff --git a/v4.changes.md b/v4.changes.md
new file mode 100644
index 0000000..b62a68b
--- /dev/null
+++ b/v4.changes.md
@@ -0,0 +1,46 @@
+## v4 changes
+
+See also the [CHANGELOG](https://github.com/suren-atoyan/monaco-react/blob/master/CHANGELOG.md)
+
+`v4` brings lots of new features and some breaking changes. First, let's see what's broken comparing with the `v3`
+
+1) `editorDidMount` - **removed**
+
+In the new version there is no `editorDidMount` property. Now it can be replaced by `onMount`. If you happen to remember, the signature of `editorDidMount` was `function(getEditorValue: () => string, monaco: Monaco) => void`
+
+The `onMount` prop is a little bit different, the signature is `function(editor: monaco.editor.IStandaloneCodeEditor, monaco: Monaco) => void`. As you can see it also exposes the `monaco` instance as a second parameter. There is no `getEditorValue`. To get the current model value you can use `editor` instance (`editor.getValue()`) or `onChange` prop. [Read more](https://github.com/suren-atoyan/monaco-react#get-value)
+
+2) `beforeMount` - **new** (`onMount` - **new**)
+
+In addition to `onMount` now there is also `beforeMount` that exposes the `monaco` instance as a first parameter. Here you can do something before the editor is mounted. [Read more](https://github.com/suren-atoyan/monaco-react#monaco-instance)
+
+3) `ControlledEditor` - **removed**
+
+`ControlledEditor` component is removed. Now there is one `Editor` component that behaves in `controlled` mode or `uncontrolled` mode based on the usage of `value` property. [Read more](https://github.com/suren-atoyan/monaco-react#uncontrolled-controlled-modes)
+
+4) `defaultModelPath ` - **new**
+
+Path for the default (auto created) model. Will be passed as the third argument to `.createModel` method - `monaco.editor.createModel(..., ..., monaco.Uri.parse(defaultModelPath))`
+
+For `DiffEditor` there are `originalModelPath` and `modifiedModelPath`
+
+5) `useMonaco` - **new**
+
+`useMonaco` is a `React` hook that returns the instance of the `monaco`. [Read more](https://github.com/suren-atoyan/monaco-react#usemonaco)
+
+6) `onValidate` - **new**
+
+`onValidate` is an additional property. An event is emitted when the length of the model markers of the current model isn't 0. [Read more](https://github.com/suren-atoyan/monaco-react#onvalidate)
+
+7) `defaultProp` - **new**
+
+The initial value of the default (auto created) model
+
+8) `monaco` utility - **renamed**
+
+now, it's called `loader`. [Read more](https://github.com/suren-atoyan/monaco-react#loader-config)
+
+9) `onChange` - **signature change**
+
+old - `function(ev: any, value: string | undefined) => string | undefined`
+new - `function(value: string | undefined, ev: monaco.editor.IModelContentChangedEvent) => void`