diff --git a/pyproject.toml b/pyproject.toml
index 4f49d3a..04c92f8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "pyclugen"
 description = "Multidimensional cluster generation in Python"
-version = "0.3.0"
+version = "0.4.0"
 authors = [ { name = "Nuno Fachada", email = "faken@fakenmc.com" } ]
 readme = "README.md"
 requires-python = ">=3.8"