diff --git a/deploy/convert_server.py b/deploy/convert_server.py
index bff4c37..edff248 100755
--- a/deploy/convert_server.py
+++ b/deploy/convert_server.py
@@ -27,6 +27,7 @@ try:
     execute("ALTER TABLE documents ADD COLUMN IF NOT EXISTS classify_input text")
     execute("ALTER TABLE documents ADD COLUMN IF NOT EXISTS zip_source text")
     execute("ALTER TABLE documents ADD COLUMN IF NOT EXISTS content_hash text")
+    execute("ALTER TABLE documents ADD COLUMN IF NOT EXISTS batch_id uuid")
 
     # ── DB modules ────────────────────────────────────────────────────────────
     from db import supplements as db_supplements