diff --git a/arkindex/dataimport/management/commands/fake_worker_version.py b/arkindex/dataimport/management/commands/fake_worker_version.py
index 1efe887baef024d95aa46f16a55ff0c2d21512c6..e6fa6101cc48eb802878c5c22ef5d4fa2b0738b1 100644
--- a/arkindex/dataimport/management/commands/fake_worker_version.py
+++ b/arkindex/dataimport/management/commands/fake_worker_version.py
@@ -63,7 +63,7 @@ class Command(BaseCommand):
         version = WorkerVersion.objects.create(
             worker=worker,
             revision=revision,
-            configuration="",
+            configuration={"configuration": {}},
         )
 
         logger.info(f"Created a worker version: {version.id}")