diff --git a/manifest.toml b/manifest.toml
index f7301d6..c26e921 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -32,6 +32,12 @@ ram.runtime = "50M"
     type = "domain"
     full_domain = true
 
+    [install.init_main_permission]
+    help.en = "If enabled, Galène will be accessible by people who do not have an account. This can be changed later via the webadmin."
+    help.fr = "Si cette case est cochée, Galène sera accessible aux personnes n’ayant pas de compte. Vous pourrez changer ceci plus tard via la webadmin."
+    type = "group"
+    default = "visitors"
+
     [install.admin]
     type = "user"