diff --git a/src/ifctester/pyproject.toml b/src/ifctester/pyproject.toml
index 38b930aaa7..be2f338522 100644
--- a/src/ifctester/pyproject.toml
+++ b/src/ifctester/pyproject.toml
@@ -23,3 +23,5 @@ dependencies = [
 [tool.setuptools.packages.find]
 include = ["ifctester"]
 exclude = ["test*"]
+[tool.setuptools.package-data]
+ifctester = ["*.xsd"]