diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/42.relativistic-mechanics/10.n1/10.main/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/42.relativistic-mechanics/10.n1/10.main/textbook.fr.md
index b1145cf0c..ce51dfcea 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/42.relativistic-mechanics/10.n1/10.main/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/42.relativistic-mechanics/10.n1/10.main/textbook.fr.md
@@ -10,4 +10,4 @@ lessons:
       order: 1
 ---
 
-Les relativités niveau 1 : main
\ No newline at end of file
+#### Les relativités niveau 1 : main
\ No newline at end of file