diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/05.waves-corpuscules/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/05.waves-corpuscules/topic.en.md
index 5738cd56d..598c268cf 100644
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/05.waves-corpuscules/topic.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/01.niv1/05.waves-corpuscules/topic.en.md
@@ -1,4 +1,6 @@
 ---
 title: 'I observe the ball and the waves : what differences and similarities?'
+published: false
+visible: false
 ---