diff --git a/titiler/stacapi/reader.py b/titiler/stacapi/reader.py
index 6bc3c48..10ef9d7 100644
--- a/titiler/stacapi/reader.py
+++ b/titiler/stacapi/reader.py
@@ -81,7 +81,7 @@ def _get_asset_info(self, asset: str) -> AssetInfo:
 
         url = asset_info.get_absolute_href() or asset_info.href
         if alternate := stac_config.alternate_url:
-            url = asset_info[alternate]["href"]
+            url = asset_info.to_dict()["alternate"][alternate]["href"]
 
         info = AssetInfo(
             url=url,