diff --git a/yaml/office-storey.yaml b/yaml/office-storey.yaml
index 446e7de..2a16d55 100644
--- a/yaml/office-storey.yaml
+++ b/yaml/office-storey.yaml
@@ -4,7 +4,7 @@ operations:
   - name: Extract storey UG and EG
     command: extract
     input: ifc/office.ifc
-    output: ifc/office_storey_UG.ifc
+    output: ifc/office_level_0.ifc
     query: "IfcElement, location = UG + IfcElement, location = EG + IfcSite + IfcGeographicElement"
 
 dest: ifc/office_level_0.ifc