diff --git a/trail_guide_content_server/db.py b/trail_guide_content_server/db.py
index 622c093..664119f 100644
--- a/trail_guide_content_server/db.py
+++ b/trail_guide_content_server/db.py
@@ -71,6 +71,7 @@
     fr'src=\\"({ASSET_URI_PATTERN_FRAGMENT})\\"|'
     fr'source=\\"({ASSET_URI_PATTERN_FRAGMENT})\\"|'
     fr'poster=\\"({ASSET_URI_PATTERN_FRAGMENT})\\"|'
+    fr'href=\\"({ASSET_URI_PATTERN_FRAGMENT})\\"|'
     fr'"asset": ?"([a-z0-9\-]{{36}})"'
 )
 
@@ -96,6 +97,10 @@ def map_to_id(rows: list[sqlite3.Row]) -> list[Any]:
     return [r["id"] for r in rows]
 
 
+def remove_blank(x: tuple[str, ...]) -> tuple[str, ...]:
+    return tuple(filter(lambda z: z != "", x))
+
+
 # TODO: JSON schema
 class ModelWithRevision:
     def __init__(
@@ -218,7 +223,7 @@ def _set_asset_usage(self, c: sqlite3.Cursor, obj_id: Any, revision: int, data:
 
         for f in self.asset_search_fields:
             if fv := data.get(f):
-                matches = [m[-1] for m in ASSET_PATTERN.findall(json.dumps(fv))]
+                matches = [remove_blank(m)[-1] for m in ASSET_PATTERN.findall(json.dumps(fv))]
                 asset_usages.update(set(matches))
 
         asset_usage_rows = [(obj_id, revision, a) for a in asset_usages if a.strip()]