diff --git a/README.md b/README.md
index e77f608..93667f4 100644
--- a/README.md
+++ b/README.md
@@ -44,3 +44,4 @@ Run `python -m unittest discover -v`.
 
 * Robert McGinley ([mcginleyr1](https://github.com/mcginleyr1))
 * Alexei Boronine ([boronine](https://github.com/boronine))
+* Sebastian Pipping ([hartwork](https://github.com/hartwork))
diff --git a/pyproject.toml b/pyproject.toml
index 388dc67..b3523fd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,6 +12,7 @@ license-files = ["LICENSE.txt"]
 authors = [
     {name = "Robert McGinley", email = "mcginleyr1@gmail.com"},
     {name = "Alexei Boronine", email = "alexei@boronine.com"},
+    {name = "Sebastian Pipping", email = "sebastian@pipping.org"},
 ]
 requires-python = ">=3.11"
 keywords = ["color", "hsl", "cie", "cieluv", "colorwheel", "hsluv", "hpluv"]