diff --git a/Changelog.md b/Changelog.md
index c2ee76d..0f9e5d7 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,51 @@
+### 4.0.0
+
+**Major changes:**
+
+- new syntax to make route structure more clean and simple
+
+```js
+<Router location='/users/42'>
+  <Index>
+    <Users path='users'>
+      <User path=':id'/>
+    </Users>
+  </Index>
+<Router/>
+```
+
+If you have a good use case when the new syntax is inconvenient please let me
+know. It's not hard to add old behaviour as option, but it will make the code
+less simple and increase the size of the library.  
+
+- router props will not be passed to components anymore  
+- path params are direct properties now  
+They were in `params` object before. In most cases things like id preferably
+to be direct properties. This is more expected, less error prone and makes code
+a bit cleaner. Sometimes it can help in optimization pure and memo components
+too. Please be care with possible property conflicts while updating to 4.0.0.
+- `path-to-regexp` upgraded to 6.1.0  
+Check [releases page](https://github.com/pillarjs/path-to-regexp/releases)
+to know major changes in a path regexp's. Tree shaking should work better with
+this lib now!
+- location and params will not be automatically URI-decoded anymore  
+You can use `decode` and `encode` in options (see
+[path-to-regexp readme](https://github.com/pillarjs/path-to-regexp#match))
+
+**Others**
+
+- TypeScript definitions
+- `genLocation` (alias: `loc`), `isPath`, `findPath`, `findPathValue` utils
+- matching [options](https://github.com/pillarjs/path-to-regexp#usage)
+- `@babel/runtime` removed from dependencies, lib deps on path-to-regexp only now
+- simplify, reduce generated code size
+- router components can be changed between renders
+- fix bug router used old component properties during next renders
+- undefined location will not throw error anymore
+- react-native package field
+- add source files to package
+- control library size with [Size Limit](https://github.com/ai/size-limit)
+
 ### 3.0.2
 
 - pass `location` property to component
@@ -11,14 +59,14 @@ any router render
 
 ### 3.0.0
 
-Major changes:
+**Major changes:**
 - react-enroute uses hooks from this version. Min supported React version is **16.8** now.
 - depending on `path-to-regexp` directly instead of outdated enroute.
 Check [path-to-regexp changelog](https://github.com/pillarjs/path-to-regexp/blob/master/History.md)
 for update details (2.x and 3.x). One noticeable change is removed wildcard
 asterisk (`*`) -- use `(.*)` instead.
 
-Others:
+**Others:**
 - esm module build added
 - `@babel/runtime` instead of built-in helper functions 
 - building with `babel@7` and `preset-env`