diff --git a/CHANGELOG.md b/CHANGELOG.md
index 27444b1..8a4df34 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.2.1] - 2023-10-17
+
+### Fixed
+- Updated the mechanism for the `dose_absorbed` dosing macro function to use a precursor; Fix for Issue https://github.com/blakeaw/pysb-pkpd/issues/4
+
 ## [0.2.0] - 2023-05-23
 
 ### Added
diff --git a/README.md b/README.md
index 4a2a3a9..fb5a1b7 100644
--- a/README.md
+++ b/README.md
@@ -3,10 +3,10 @@
 ![Python version badge](https://img.shields.io/badge/python-3.11.3-blue.svg)
 [![PySB version badge](https://img.shields.io/badge/PySB->%3D1.15.0-9cf.svg)](https://pysb.org/)
 [![license](https://img.shields.io/github/license/blakeaw/pysb-pkpd.svg)](LICENSE)
-![version](https://img.shields.io/badge/version-0.2.0-orange.svg)
-[![release](https://img.shields.io/github/release-pre/blakeaw/pysb-pkpd.svg)](https://github.com/blakeaw/pysb-pkpd/releases/tag/v0.2.0)
+![version](https://img.shields.io/badge/version-0.2.1-orange.svg)
+[![release](https://img.shields.io/github/release-pre/blakeaw/pysb-pkpd.svg)](https://github.com/blakeaw/pysb-pkpd/releases/tag/v0.2.1)
 
-`pysb-pkpd` is an add-on for the [PySB](https://pysb.org/) modeling framework that provides domain-specific macros and pre-constructed models for empirical and mechanistic PK/PD modeling. `pysb-pkpd` could also be used in conjuction with core PySB features to help build and execute quantitative systems pharmacology/toxicology (QSP/QST) models.
+`pysb-pkpd` is an add-on for the [PySB](https://pysb.org/) modeling framework that provides domain-specific macros and pre-constructed models for compartmental and mechanistic PK/PD modeling. `pysb-pkpd` could also be used in conjuction with core PySB features to help build and execute quantitative systems pharmacology/toxicology (QSP/QST) models.
 
 ## Table of Contents
 
@@ -43,27 +43,27 @@ Note that `pysb-pkpd` has the following core dependencies:
 
 ### pip install
 
-You can install `pysb-pkpd` version 0.2.0 with `pip` sourced from the GitHub repo:
+You can install `pysb-pkpd` version 0.2.1 with `pip` sourced from the GitHub repo:
 
 ##### with git installed:
 
 Fresh install:
 ```
-pip install git+https://github.com/blakeaw/pysb-pkpd@v0.2.0
+pip install git+https://github.com/blakeaw/pysb-pkpd@v0.2.1
 ```
 Or to upgrade from an older version:
 ```
-pip install --upgrade git+https://github.com/blakeaw/pysb-pkpd@v0.2.0
+pip install --upgrade git+https://github.com/blakeaw/pysb-pkpd@v0.2.1
 ```
 ##### without git installed:
 
 Fresh install:
 ```
-pip install https://github.com/blakeaw/pysb-pkpd/archive/refs/tags/v0.2.0.zip
+pip install https://github.com/blakeaw/pysb-pkpd/archive/refs/tags/v0.2.1.zip
 ```
 Or to upgrade from an older version:
 ```
-pip install --upgrade https://github.com/blakeaw/pysb-pkpd/archive/refs/tags/v0.2.0.zip
+pip install --upgrade https://github.com/blakeaw/pysb-pkpd/archive/refs/tags/v0.2.1.zip
 ```
 ### Manual install
 
diff --git a/setup.py b/setup.py
index 184e5af..968c17e 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 setuptools.setup(
     name="pysb-pkpd",
-    version="0.2.0",
+    version="0.2.1",
     python_requires=">=3.8",
     install_requires=["pysb>=1.15.0"],
     extras_require={"cython": "cython>=0.29.25"},