diff --git a/buds/10.md b/buds/10.md
index 7263a4e..7228978 100644
--- a/buds/10.md
+++ b/buds/10.md
@@ -26,7 +26,7 @@ Clients MUST add an `x` tag with the merkle root to the `2001` event
 
 Example:
 
-```marmaid
+```mermaid
 graph TD
   Root["Root (ABCDEFG)"] --> H1["ABCD"]
   Root --> H2["EFG"]