diff --git a/README.md b/README.md
index dee624fc..1a191a3a 100644
--- a/README.md
+++ b/README.md
@@ -62,12 +62,12 @@ If you use pyrolite extensively for your research, citation of the software woul
 
 ## Development & Build Status
 
-[![Formatted with Black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/python/black)
+[![Formatted with Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
 [![Code Quality](https://api.codacy.com/project/badge/Grade/fd9912a3faae43bf84a47e3da685d84c)](https://app.codacy.com/gh/morganjwilliams/pyrolite/dashboard?utm_source=github.com&utm_medium=referral&utm_content=morganjwilliams/pyrolite&utm_campaign=Badge_Grade)
 
 |                                                                                  **main**                                                                                  |                                                                                  **develop**                                                                                   |
 |:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|
-|                               [![Unit Tests on main](https://github.com/morganjwilliams/pyrolite/workflows/Unittest/badge.svg?branch=main)](https://github.com/morganjwilliams/pyrolite/actions?query=workflow:Unittest+branch:main)                                |                               [![Unit Tests on Develop](https://github.com/morganjwilliams/pyrolite/workflows/Unittest/badge.svg?branch=develop)](https://github.com/morganjwilliams/pyrolite/actions?query=workflow:Unittest+branch:develop)                                |
+|                               [![Unit Tests on main](https://github.com/morganjwilliams/pyrolite/actions/workflows/unittest.yml/badge.svg?branch=main)](https://github.com/morganjwilliams/pyrolite/actions?query=workflow:Unittest+branch:main)                                |                               [![Unit Tests on Develop](https://github.com/morganjwilliams/pyrolite/actions/workflows/unittest.yml/badge.svg?branch=develop)](https://github.com/morganjwilliams/pyrolite/actions?query=workflow:Unittest+branch:develop)                                |
 | [![Coverage Status](https://coveralls.io/repos/github/morganjwilliams/pyrolite/badge.svg?branch=main)](https://coveralls.io/github/morganjwilliams/pyrolite?branch=main) | [![Coverage Status](https://coveralls.io/repos/github/morganjwilliams/pyrolite/badge.svg?branch=develop)](https://coveralls.io/github/morganjwilliams/pyrolite?branch=develop) |
 
 **Maintainer**: Morgan Williams (morgan.williams _at_ csiro.au)
diff --git a/environment.yml b/environment.yml
index 7f98c8db..ec00f679 100644
--- a/environment.yml
+++ b/environment.yml
@@ -32,7 +32,7 @@ dependencies:
   # - jupyterlite-sphinx
   # - jupyterlite-pyodide-kernel
   - pip
-  - black
+  - ruff
   - isort
   - pytest
   - pytest-runner
diff --git a/pyproject.toml b/pyproject.toml
index 93acc6bf..ed6c98d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -65,7 +65,7 @@ excel = ["xlrd", "openpyxl"]
 dev = [
     "pytest",
     "versioneer",
-    "black",
+    "ruff",
     "isort",
     "twine",
     "pyrolite[test,docs,skl]",