diff --git a/src/npc_lims/metadata/codeocean.py b/src/npc_lims/metadata/codeocean.py
index 6a6a8b5..7cb961b 100644
--- a/src/npc_lims/metadata/codeocean.py
+++ b/src/npc_lims/metadata/codeocean.py
@@ -35,7 +35,7 @@
         "last_used",
         "name",
         "size",
-        "sourceBucket",
+        "source_bucket",
         "state",
         "tags",
         "type",
@@ -387,11 +387,11 @@ def get_raw_data_root(session: str | npc_session.SessionRecord) -> upath.UPath:
 def get_path_from_data_asset(asset: DataAssetAPI) -> upath.UPath:
     """Reconstruct path to raw data in bucket (e.g. on s3) using data asset
     uuid or dict of info from Code Ocean API."""
-    if "sourceBucket" not in asset:
+    if "source_bucket" not in asset:
         raise ValueError(
-            f"Asset {asset['id']} has no `sourceBucket` info - not sure how to create UPath:\n{asset!r}"
+            f"Asset {asset['id']} has no `source_bucket` info - not sure how to create UPath:\n{asset!r}"
         )
-    bucket_info = asset["sourceBucket"]
+    bucket_info = asset["source_bucket"]
     roots = {"aws": "s3", "gcs": "gs"}
     if bucket_info["origin"] not in roots:
         raise RuntimeError(
diff --git a/src/npc_lims/paths/s3.py b/src/npc_lims/paths/s3.py
index 8e97fab..e3a470a 100644
--- a/src/npc_lims/paths/s3.py
+++ b/src/npc_lims/paths/s3.py
@@ -37,7 +37,7 @@ def get_data_asset_s3_path(asset_id: str | codeocean.DataAssetAPI) -> upath.UPat
     """
     bucket = CODE_OCEAN_DATA_BUCKET
     with contextlib.suppress(AttributeError, KeyError, TypeError):
-        bucket = upath.UPath(upath.UPath(f's3://{asset_id["sourceBucket"]}'))  # type: ignore[index]
+        bucket = upath.UPath(upath.UPath(f's3://{asset_id["source_bucket"]}'))  # type: ignore[index]
     with contextlib.suppress(AttributeError, KeyError):
         return bucket / asset_id.get("id")  # type: ignore[union-attr, operator]
     with contextlib.suppress(AttributeError):