diff --git a/index.md b/index.md
index b78036e98313892197cc66268de721eab8a5b146..acae593c828aecc3af464718b438965ef5a33b31 100644
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@@ -52,7 +52,7 @@ Chaîne *BBB* du cours <https://bbb.hesge.ch/b/ore-xff-hkz-poh>
 
 ## Exercices
 
-### 02.05.2023: Arbres quternaires, [HTML](https://malaspinas.academy/prog_seq_c_tp/quadtree/index.html), [PDF](https://malaspinas.academy/prog_seq_c_tp/quadtree/quadtree.pdf), [GIT](https://gitedu.hesge.ch/programmation_sequentielle/travaux_pratiques/c_lang/quadtree/enonce), [BUZZ](https://malaspinas.academy/prog_seq_c_tp/quadtree/buzz.pgm)
+### 02.05.2023: Arbres quaternaires, [HTML](https://malaspinas.academy/prog_seq_c_tp/quadtree/index.html), [PDF](https://malaspinas.academy/prog_seq_c_tp/quadtree/quadtree.pdf), [GIT](https://gitedu.hesge.ch/programmation_sequentielle/travaux_pratiques/c_lang/quadtree/enonce), [BUZZ](https://malaspinas.academy/prog_seq_c_tp/quadtree/buzz.pgm)
 
 ### 18.04.2023: Julia, [HTML](https://malaspinas.academy/prog_seq_c_tp/julia/index.html), [PDF](https://malaspinas.academy/prog_seq_c_tp/julia/julia.pdf), [GIT](https://gitedu.hesge.ch/programmation_sequentielle/travaux_pratiques/c_lang/julia/enonce)