diff --git a/HISTORY.rst b/HISTORY.rst
index 88976b35..23d801ca 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -3,10 +3,11 @@
 History
 =======
 
-Unreleased
-==========
+4.0.0
+=====
 * Drop support for Python 3.8
 * Confirm support for Django 5.1 and drop support for Django 3.2
+* Use pyproject.toml
 
 3.1.0
 =====
diff --git a/pyproject.toml b/pyproject.toml
index a00e24ff..7be2f393 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "django-pipeline"
 requires-python = ">=3.9"
-version = "3.1.0"
+version = "4.0.0"
 description = "Pipeline is an asset packaging library for Django."
 readme = "README.rst"
 authors = [{ "name" = "Timothée Peignier", "email" = "timothee.peignier@tryphon.org" }]