diff --git a/CHANGELOG.md b/CHANGELOG.md
index d5ce45b..f6d89cf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,9 +3,21 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-###  [v0.3](https://github.com/fpagliughi/rust-industrial-io/compare/v0.2..v0.3) - 2021-05-26
+###  [v0.4.0](https://github.com/fpagliughi/rust-industrial-io/compare/v0.3..v0.4.0) - 20222-01-28
+
+- [#12](https://github.com/fpagliughi/rust-industrial-io/pull/12) Context construction now takes a `Backend` enumeration type.
+- The `InnerContext` is now public and can be cloned and sent to another thread to create a cloned context in the other thread.
+- [#15](https://github.com/fpagliughi/rust-industrial-io/issues/15) Generic `attr_read()` and `attr_write()` functions for devices, channels, and buffers.
+- [#17](https://github.com/fpagliughi/rust-industrial-io/pull/17) macOS support (for network clients)
+- Buffer attribute read/write functions and iterators moved into the `Buffer` struct.
+- `Buffer` struct now contains a clone of the `Device` from which it was created.
+- `Device` and `Channel` now support `Clone` trait.
+- Updates to the examples for more/different hardware.
+- New `Version` struct which is returned by the library and `Context` version query functions.
 
 
+###  [v0.3](https://github.com/fpagliughi/rust-industrial-io/compare/v0.2..v0.3) - 2021-05-26
+
 - Support for _libiio_ v0.21
 - Updated error handling:
     - Support for `std::error`
diff --git a/Cargo.toml b/Cargo.toml
index e122ebd..af27f38 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "industrial-io"
-version = "0.4.0-pre"
+version = "0.4.0"
 edition = "2018"
 authors = ["Frank Pagliughi <fpagliughi@mindspring.com>"]
 repository = "https://github.com/fpagliughi/rust-industrial-io"
diff --git a/README.md b/README.md
index ad424f4..01f186f 100644
--- a/README.md
+++ b/README.md
@@ -43,29 +43,18 @@ To keep up with the latest announcements for this project, follow:
 
 **Twitter:**  [@fmpagliughi](https://twitter.com/fmpagliughi)
 
-### Unreleased Features in This Branch
+### New in Version 0.4.0
 
-- [#12](https://github.com/fpagliughi/rust-industrial-io/pull/12) Context construction now takes a `Backend` enumeration type. (Thanks @Funky185540)
+- [#12](https://github.com/fpagliughi/rust-industrial-io/pull/12) Context construction now takes a `Backend` enumeration type.
 - The `InnerContext` is now public and can be cloned and sent to another thread to create a cloned context in the other thread.
 - [#15](https://github.com/fpagliughi/rust-industrial-io/issues/15) Generic `attr_read()` and `attr_write()` functions for devices, channels, and buffers.
+- [#17](https://github.com/fpagliughi/rust-industrial-io/pull/17) macOS support (for network clients)
 - Buffer attribute read/write functions and iterators moved into the `Buffer` struct.
 - `Buffer` struct now contains a clone of the `Device` from which it was created.
 - `Device` and `Channel` now support `Clone` trait.
 - Updates to the examples for more/different hardware.
 - New `Version` struct which is returned by the library and `Context` version query functions.
 
-### New in v0.3
-
-- Support for _libiio_ v0.21
-- Updated error handling:
-    - Support for `std::error`
-    - Implementation changed to use `thiserror` (from *error_chain*)
-    - Specific types defined for common errors intead of just string descriptions (`WrongDataType`, `BadReturnSize`, `InvalidIndex,` etc)
-- New device capabilities:
-    - _remove_trigger()_
-    - _is_buffer_capable()_
-- New utility app: _riio_stop_all_
-
 ## The Basics
 
 The C _libiio_ library provides a user-space interface to the Linux Industrial I/O subsystem for interfacing to (possibly high-speed) analog hardware, such as A/D's, D/A's, accelerometers, gyroscopes, etc. This crate provides a fairly thin, safe, wrapper around the C library.
diff --git a/libiio-sys/Cargo.toml b/libiio-sys/Cargo.toml
index ee7e6cb..6d84606 100644
--- a/libiio-sys/Cargo.toml
+++ b/libiio-sys/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "libiio-sys"
-version = "0.3.0"
+version = "0.3.1"
 edition = "2018"
 authors = ["Frank Pagliughi <fpagliughi@mindspring.com>"]
 repository = "https://github.com/fpagliughi/rust-industrial-io"