diff --git a/home-apps/demo-service/_db.py b/home-apps/demo-service/_db.py
index 454c9f0..223f876 100644
--- a/home-apps/demo-service/_db.py
+++ b/home-apps/demo-service/_db.py
@@ -34,7 +34,12 @@ def _init_schema(conn: sqlite3.Connection):
             updated_at TEXT NOT NULL
         )
     """)
-    # Migration: populate visibility from old enabled/published columns
+    # Migration: add visibility column to existing tables (from v1 schema)
+    try:
+        conn.execute("ALTER TABLE sites ADD COLUMN visibility TEXT NOT NULL DEFAULT 'internal'")
+    except sqlite3.OperationalError:
+        pass  # column already exists
+    # Migrate old enabled/published data to visibility
     conn.execute("""
         UPDATE sites SET visibility = 'disabled' WHERE enabled = 0 AND visibility = 'internal'
     """)