diff --git a/views/en/home.pug b/views/en/home.pug
index 532e1a803abb18b2032ea46d95690340553c8a33..d297c431b27c7078774ae73e03de21d4f4906a65 100644
--- a/views/en/home.pug
+++ b/views/en/home.pug
@@ -4,4 +4,6 @@ block content
 
 	h1.text-terracotta= title
 	p.lead
-		| CSSP 2023 will take place on 7-8 December 2023 (preceding a #[a.text-terracotta(href="https://sites.google.com/view/morallanguageworkshop2023/accueil" target="_blank") thematic workshop "Moral language"] on 11 December 2023) at Ecole Normale Supérieure, Paris.
\ No newline at end of file
+		| CSSP 2023 will take place on 7-8 December 2023 (preceding a #[a.text-terracotta(href="https://sites.google.com/view/morallanguageworkshop2023/accueil" target="_blank") thematic workshop "Moral language"] on 11 December 2023) at Ecole Normale Supérieure, Paris.
+	p.lead
+		| Registration is free but mandatory.
\ No newline at end of file
diff --git a/views/en/information.pug b/views/en/information.pug
index edc26e221c7e137d4c4facdd09a86d18a3a8a9d0..ac054cdec51c4ef855aaa64db896485d717218c0 100644
--- a/views/en/information.pug
+++ b/views/en/information.pug
@@ -14,6 +14,9 @@ block content
 		br
 		| 29 rue d’Ulm, 75005 Paris
 
+	p
+		| Registration is free but mandatory.
+
 	h2.text-pot
 		| Transport and accommodation
 	p
diff --git a/views/en/program.pug b/views/en/program.pug
index 6290b3bd20b7d21a18a6865fe5418f60759aca80..c0a26bfb99a5c8677676a2d28dfd07cb2a4ae2f8 100644
--- a/views/en/program.pug
+++ b/views/en/program.pug
@@ -4,6 +4,9 @@ block content
 
 	h1.text-terracotta= title
 
+	p.lead
+		| Registration is free but mandatory.
+
 	h2.text-pot
 		| Thursday, 7 december
 	p
diff --git a/views/fr/home.pug b/views/fr/home.pug
index ba1b4c9086dcda8204bbefce015d87e19e836abf..83f4bc46d8af8583974e5a69fce84f500aa101c6 100644
--- a/views/fr/home.pug
+++ b/views/fr/home.pug
@@ -5,3 +5,5 @@ block content
 	h1.text-terracotta= title
 	p.lead
 		| CSSP 2023 aura lieu les 7-8 décembre 2023 (avec, en plus, un #[a.text-terracotta(href="https://sites.google.com/view/morallanguageworkshop2023/accueil" target="_blank") workshop thématique "Langage moral"] le 11 décembre 2023) à l'Ecole Normale Supérieure, Paris.
+	p.lead
+		| L’inscription est gratuite mais obligatoire.
diff --git a/views/fr/information.pug b/views/fr/information.pug
index 0d1c92458fc6fcd2ec5325c54dc89151a8e43aa9..6c60a8b156bee0521c29dfc9f356b3e42be9ae1c 100644
--- a/views/fr/information.pug
+++ b/views/fr/information.pug
@@ -15,6 +15,9 @@ block content
 		br
 		| 29 rue d’Ulm, 75005 Paris
 
+	p
+		| L’inscription est gratuite mais obligatoire.
+
 	h2.text-pot
 		| Transport et logement
 	p
diff --git a/views/fr/program.pug b/views/fr/program.pug
index 8a0d289a08c0744df2ce247cf744ec75b18565ca..5e366e992c540ae70e1194dbf04f39af7b617c7f 100644
--- a/views/fr/program.pug
+++ b/views/fr/program.pug
@@ -4,6 +4,9 @@ block content
 
 	h1.text-terracotta= title
 
+	p.lead
+		| L’inscription est gratuite mais obligatoire.
+
 	h2.text-pot
 		| Jeudi 7 décembre
 	p