diff --git a/pyproject.toml b/pyproject.toml
index 079d058..2f207ac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "py-lib3mf"
-version = "2.2.0"
+version = "2.3.1"
 description = "A python package for Lib3MF tools"
 readme = "README.md"
 requires-python = ">=3.9"