diff --git a/index.md b/index.md
index 6c0947f838a5394b8f02dd6020027e7fe418c392..9b2f87b8fb205120e181e217cc05bfaf0549f7bd 100644
--- a/index.md
+++ b/index.md
@@ -87,6 +87,8 @@ La chaîne *mixer.com* de mes cours se trouve sur <https://www.mixer.com/omhepia
 
 ## Code Morse, [HTML](prog_seq_c_tp/morse/index.html), [PDF](prog_seq_c_tp/morse/morse.pdf)
 
+## Arbres quaternaires, [HTML](prog_seq_c_tp/quadtree/index.html), [PDF](prog_seq_c_tp/quadtree/quadtree.pdf)
+
 
 :::
 ::: {.column width="60%"}