diff --git a/frouros/__init__.py b/frouros/__init__.py
index ce6d72b..14441d2 100644
--- a/frouros/__init__.py
+++ b/frouros/__init__.py
@@ -1,3 +1,3 @@
 """Frouros."""
 
-__version__ = "0.3.2"
+__version__ = "0.4.0"
diff --git a/pyproject.toml b/pyproject.toml
index 184e6c3..353a241 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "frouros"
-version = "0.3.2"
-description = "An open source Python library for drift detection in machine learning systems"
+version = "0.4.0"
+description = "An open-source Python library for drift detection in machine learning systems"
 authors = [
     {name = "Jaime Céspedes Sisniega", email = "cespedes@ifca.unican.es"}
 ]