diff --git a/CHANGELOG.md b/CHANGELOG.md
index 12aba29..839436b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.8.4] - 2021-05-18
+
+### Added
+
+- Implementation of `ToOCaml<T>` for `BoxRoot<T>`.
+
+### Added
+
+- Conversion from/to unit (`()`) values.
+
 ## [0.8.3] - 2021-04-30
 
 ### Added
@@ -197,7 +207,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `OCaml<f64>` is no longer a valid representation for OCaml floats, use `OCaml<OCamlFloat>` instead.
 - `keep` method in GC handles and `OCaml<T>` values was removed. The `keep` method in root variables should be used instead, or the third optional parameter of the `to_ocaml!` macro.
 
-[Unreleased]: https://github.com/tezedge/ocaml-interop/compare/v0.8.3...HEAD
+[Unreleased]: https://github.com/tezedge/ocaml-interop/compare/v0.8.4...HEAD
+[0.8.4]: https://github.com/tezedge/ocaml-interop/compare/v0.8.3...v0.8.4
 [0.8.3]: https://github.com/tezedge/ocaml-interop/compare/v0.8.2...v0.8.3
 [0.8.2]: https://github.com/tezedge/ocaml-interop/compare/v0.8.1...v0.8.2
 [0.8.1]: https://github.com/tezedge/ocaml-interop/compare/v0.8.0...v0.8.1
diff --git a/Cargo.toml b/Cargo.toml
index 4e508c0..7b6df82 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ocaml-interop"
-version = "0.8.3" # remember to update html_root_url
+version = "0.8.4" # remember to update html_root_url
 authors = ["Bruno Deferrari <utizoc@gmail.com>"]
 license = "MIT"
 description = "Utilities for Rust and OCaml interoperability"
diff --git a/src/lib.rs b/src/lib.rs
index b184b04..2c477e7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,7 @@
 // Copyright (c) Viable Systems and TezEdge Contributors
 // SPDX-License-Identifier: MIT
 
-#![doc(html_root_url = "https://docs.rs/ocaml-interop/0.8.3")]
+#![doc(html_root_url = "https://docs.rs/ocaml-interop/0.8.4")]
 
 //! _Zinc-iron alloy coating is used in parts that need very good corrosion protection._
 //!