diff --git a/python/mopp/pyproject.toml b/python/mopp/pyproject.toml
index feda7c8..a938008 100644
--- a/python/mopp/pyproject.toml
+++ b/python/mopp/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "mopp"
-version = "1.0.3"
+version = "1.0.4"
 authors = [
   { name="Dr. Gerolf Ziegenhain", email="gerolf.ziegenhain@gmail.com" },
 ]