diff --git a/mowgli/__init__.py b/mowgli/__init__.py
index 914b218..0afcbaf 100644
--- a/mowgli/__init__.py
+++ b/mowgli/__init__.py
@@ -4,4 +4,4 @@
 import mowgli.tl
 import mowgli.utils
 
-__version__ = "0.3.0"
+__version__ = "0.4.0"
diff --git a/pyproject.toml b/pyproject.toml
index 637eaa4..b89515e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "mowgli"
-version = "0.3.0"
+version = "0.4.0"
 description = "Mowgli is a novel method for the integration of paired multi-omics data with any type and number of omics, combining integrative Nonnegative Matrix Factorization and Optimal Transport."
 authors = ["Geert-Jan Huizing <huizing@ens.fr>"]
 license = "GPL-3.0-only"