diff --git a/backend/app/pypi_proxy.py b/backend/app/pypi_proxy.py
index 9d599d7..b376e78 100644
--- a/backend/app/pypi_proxy.py
+++ b/backend/app/pypi_proxy.py
@@ -488,7 +488,9 @@ async def pypi_download_file(
             system_project = Project(
                 name="_pypi",
                 description="System project for cached PyPI packages",
-                visibility="private",
+                is_public=False,
+                is_system=True,
+                created_by="pypi-proxy",
             )
             db.add(system_project)
             db.flush()
@@ -519,6 +521,7 @@ async def pypi_download_file(
                 package_id=package.id,
                 name=filename,
                 artifact_id=sha256,
+                created_by="pypi-proxy",
             )
             db.add(tag)