diff --git a/services/datalad/datalad_service/common/s3.py b/services/datalad/datalad_service/common/s3.py
index 56dca34e2..c240f63b9 100644
--- a/services/datalad/datalad_service/common/s3.py
+++ b/services/datalad/datalad_service/common/s3.py
@@ -190,7 +190,7 @@ async def s3_export(dataset_path, target, treeish):
 async def s3_backup_push(dataset_path):
     """Perform an S3 push to the backup remote on a git-annex repo."""
     await run_check(
-        ['git-annex', 'push', get_s3_backup_remote()],
+        ['git-annex', 'push', '--all', get_s3_backup_remote()],
         dataset_path,
         env=backup_remote_env(),
     )