diff --git a/adit/core/utils/dicom_utils.py b/adit/core/utils/dicom_utils.py
index c984a82c..b1439365 100644
--- a/adit/core/utils/dicom_utils.py
+++ b/adit/core/utils/dicom_utils.py
@@ -79,7 +79,7 @@ def _build_date_time_datetime_range(
 ):
     start_date = str(vr_class(start)) if start else ""
     end_date = str(vr_class(end)) if end else ""
-    return f"{start_date} - {end_date}"
+    return f"{start_date}-{end_date}"
 
 
 def _convert_to_dicom_date_time_datetime(