diff --git a/docs/changelog.md b/docs/changelog.md
index dfe2a75..7f4d2bb 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -1,5 +1,9 @@
 # Changelog
 
+### 5.0.4 - `pyproject.toml`
+
+Added `pyproject.toml`.
+
 ### 5.0.3 - bug fixes
 
 Fixed bug with mini-lambda < 2.2. Fixed [#48](https://github.com/smarie/python-valid8/issues/48).
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..a5835a1
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,7 @@
+[build-system]
+requires = [
+    "setuptools",
+    "setuptools_scm",
+    "six",
+]
+build-backend = "setuptools.build_meta"