diff --git a/docker/dicom_indexer/indexer/index_dicom.py b/docker/dicom_indexer/indexer/index_dicom.py
index 66625fb..22ae71d 100644
--- a/docker/dicom_indexer/indexer/index_dicom.py
+++ b/docker/dicom_indexer/indexer/index_dicom.py
@@ -7,6 +7,7 @@ import datalad.api as dlad
 import shutil
 import gitlab
 import tempfile
+import subprocess
 from contextlib import contextmanager