diff --git a/pyproject.toml b/pyproject.toml
index e0718b8..0f12840 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "roiloc"
-version = "0.3.0"
+version = "0.4.0"
 description = "A simple package to center and crop T1w & T2w MRIs around a given region of interest by its name."
 license = {text = "MIT License"}
 readme = {file = "README.rst", content-type = "text/x-rst"}
diff --git a/roiloc/__init__.py b/roiloc/__init__.py
index 493f741..6a9beea 100644
--- a/roiloc/__init__.py
+++ b/roiloc/__init__.py
@@ -1 +1 @@
-__version__ = "0.3.0"
+__version__ = "0.4.0"
diff --git a/tests/test_roiloc.py b/tests/test_roiloc.py
index 332f0fa..1f7c7e2 100644
--- a/tests/test_roiloc.py
+++ b/tests/test_roiloc.py
@@ -2,4 +2,4 @@
 
 
 def test_version():
-    assert __version__ == "0.3.0"
+    assert __version__ == "0.4.0"
diff --git a/uv.lock b/uv.lock
index 0112cc5..7b4e9b4 100644
--- a/uv.lock
+++ b/uv.lock
@@ -798,7 +798,7 @@ wheels = [
 
 [[package]]
 name = "roiloc"
-version = "0.3.0"
+version = "0.4.0"
 source = { editable = "." }
 dependencies = [
     { name = "antspyx" },