diff --git a/content/polkadot/scaling-heterogeneous/slides.md b/content/polkadot/scaling-heterogeneous/slides.md
index 8104260..5ea69af 100644
--- a/content/polkadot/scaling-heterogeneous/slides.md
+++ b/content/polkadot/scaling-heterogeneous/slides.md
@@ -164,7 +164,7 @@ Notes:
 
 Notes:
 
-- <https://docs.celestia.org/concepts/how-celestia-works/data-availability-layer/>
+- <https://docs.celestia.org/learn/how-celestia-works/data-availability-layer>
 
 ---