diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/50.n4/20.fr/10.main/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/50.n4/20.fr/10.main/textbook.fr.md
index caa91cde4..b7740329a 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/50.n4/20.fr/10.main/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/50.n4/20.fr/10.main/textbook.fr.md
@@ -12,6 +12,6 @@ lessons:
       order: 2
 ---
 
-### Mécanique classique, n4, principale
+#### Mécanique classique, n4, principale
 
 ------------------------------------------------
\ No newline at end of file