diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7580afc..2b74506 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -16,6 +16,11 @@ Bug reports should include how to reproduce said bug, if known.
     - If your changes are not complete but e.g. you want feedback on your idea before fully committing to it, open a draft PR.
     - Otherwise, feel free to open a regular PR.
 
+**Important:** Open PRs to the `main` branch only if your changes do not introduce incompatibilities with the latest
+release of `egui_dock`, a.k.a. breaking changes. All breaking changes should be merged into a special `release-0.XYZ`
+branch instead. This is to make it possible to release non-breaking bugfixes without requiring to update to a new incompatible
+release.
+
 Before your PR is merged, it needs to be approved by one of the maintainers.
 To minimize the review time, make sure all the following requirements are met:
 
diff --git a/Cargo.toml b/Cargo.toml
index ecc5c9f..c3a077a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "egui_dock"
 description = "Docking support for `egui` - an immediate-mode GUI library for Rust"
 authors = ["lain-dono", "Adam Gąsior (Adanos020)"]
-version = "0.3.1"
+version = "0.4.0"
 edition = "2021"
 rust-version = "1.65"
 license = "MIT"
diff --git a/README.md b/README.md
index 90900fc..760fca9 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # `egui_dock`: docking support for [egui](https://github.com/emilk/egui)
 
-[![egui_ver](https://img.shields.io/badge/egui-0.20-blue)](https://github.com/emilk/egui)
+[![egui_ver](https://img.shields.io/badge/egui-0.21-blue)](https://github.com/emilk/egui)
 [![Crates.io](https://img.shields.io/crates/v/egui_dock)](https://crates.io/crates/egui_dock)
 [![docs.rs](https://img.shields.io/docsrs/egui_dock)](https://docs.rs/egui_dock/)
 
@@ -15,15 +15,14 @@ Before contributing, please read [the contribution guide](CONTRIBUTING.md).
 
 ## Quick start
 
-Add `egui_dock` to your project's dependencies.
+Add `egui` and `egui_dock` to your project's dependencies.
 
 ```toml
 [dependencies]
-egui_dock = "0.3"
+egui = "0.21"
+egui_dock = "0.4"
 ```
 
-Instead of explicitly depending on `egui`, prefer using `egui_dock::egui` since it's the compatible version.
-
 Then proceed by setting up `egui`, following its [quick start guide](https://github.com/emilk/egui#quick-start).
 Once that's done, you can start using `egui_dock` – more details on that can be found in the
 [documentation](https://docs.rs/egui_dock/latest/egui_dock/).