diff --git a/src/tad_dftd4/__version__.py b/src/tad_dftd4/__version__.py
index dc176c6..24bd834 100644
--- a/src/tad_dftd4/__version__.py
+++ b/src/tad_dftd4/__version__.py
@@ -17,4 +17,4 @@
 """
 Module containing the version string.
 """
-__version__ = "0.3.0"
+__version__ = "0.4.0"