diff --git a/ogc/bblocks/transformers/xslt.py b/ogc/bblocks/transformers/xslt.py
index da93bf6..fab513b 100644
--- a/ogc/bblocks/transformers/xslt.py
+++ b/ogc/bblocks/transformers/xslt.py
@@ -21,6 +21,6 @@ def __init__(self):
         super().__init__(['xslt'], default_inputs, default_outputs)
 
     def do_transform(self, metadata: TransformMetadata) -> AnyStr | None:
-        transform = etree.XSLT(etree.XML(metadata.transform_content.encode('utf-8')))
+        transform = etree.XSLT(etree.XML(metadata.transform_content.encode('utf-8'), base_url = metadata.metadata.get('url', '').encode('utf-8')))
         result = transform(etree.XML(metadata.input_data.encode('utf-8')))
         return etree.tostring(result, encoding='utf-8', pretty_print=True, xml_declaration=True).decode('utf-8')