diff --git a/src/crn_utils/release_util.py b/src/crn_utils/release_util.py
index 6095058..0908f33 100644
--- a/src/crn_utils/release_util.py
+++ b/src/crn_utils/release_util.py
@@ -109,7 +109,12 @@ def prep_release_metadata(dataset_id: str,
     """
 
     # normalize source
-    source_for_ids = normalize_source_for_ids(dataset_id=dataset_id, organism=organism, source=source)
+    source_for_ids = normalize_source_for_ids(
+        dataset_id=dataset_id, 
+        organism=organism, 
+        source=source,
+        release_version=release_version
+    )
 
     # ---- Load metadata tables ----
     logging.info(f"Loading metadata tables from {metadata_dir}...")