diff --git a/content/u/advent-calendar/04/contents.lr b/content/u/advent-calendar/04/contents.lr
index 67f8618..fea5cef 100644
--- a/content/u/advent-calendar/04/contents.lr
+++ b/content/u/advent-calendar/04/contents.lr
@@ -28,7 +28,7 @@ content1_text:
 
 ## A yearly Zero Carbon Cloud with 10% discount 
 
-You can order our Zero Carbon Cloud 100 GB plan for a year with 10% discount. Only available for 10 orders, grab it while you can.
+You can order our [Zero Carbon Cloud](https://ungleich.ch/u/products/zero-carbon-cloud/) 100 GB plan for a year with 10% discount. Only available for 10 orders, grab it while you can.
 
 ## About the product