diff --git a/manifest.yaml b/manifest.yaml
index da64dcd..0080959 100644
--- a/manifest.yaml
+++ b/manifest.yaml
@@ -21,6 +21,7 @@ dublin_core:
   publisher: 'BCS'
   relation:
     - 'as/ulb'
+    - 'as/tw'
     - 'as/tq'
   rights: 'CC BY-SA 4.0'
   source: