diff --git a/scripts/install b/scripts/install
index 4568211..8b5ab5f 100755
--- a/scripts/install
+++ b/scripts/install
@@ -36,7 +36,6 @@ ynh_script_progression --message="Storing installation settings..."
 ynh_app_setting_set --app $app --key admin --value $admin
 ynh_app_setting_set --app $app --key language --value $language
 ynh_app_setting_set --app $app --key final_path --value $final_path
-ynh_app_setting_set --app $app --key is_public --value $is_public
 ynh_app_setting_set --app $app --key service_autodiscovery --value $service_autodiscovery
 ynh_app_setting_set --app $app --key whups_install --value $whups_install
 ynh_app_setting_set --app $app --key sesha_install --value $sesha_install
@@ -158,11 +157,11 @@ set_permission
 
 # configure the sso
 ynh_script_progression --message="Configuring permissions..."
-if [ "$is_public" = "0" ];
-then	# Retire l'accès public
-    ynh_app_setting_delete --app $app --key skipped_uris
-else
-    ynh_app_setting_set --app $app --key unprotected_uris --value "/"
+
+# Make app public if necessary
+if [ "$is_public" -eq 1 ]
+then
+	ynh_permission_update --permission="main" --add="visitors"
 fi
 
 # SETUP LOGROTATE
diff --git a/scripts/upgrade b/scripts/upgrade
index dee9cef..9d79eeb 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -10,6 +10,16 @@ source /usr/share/yunohost/helpers
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
+#=================================================
+# Migrate legacy permissions to new system
+#=================================================
+if ynh_legacy_permissions_exists
+then
+	ynh_legacy_permissions_delete_all
+
+	ynh_app_setting_delete --app=$app --key=is_public
+fi
+
 # Import common cmd
 source ./experimental_helper.sh
 source ./_common.sh
@@ -38,6 +48,16 @@ ynh_clean_setup () {
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
+#=================================================
+# Migrate legacy permissions to new system
+#=================================================
+if ynh_legacy_permissions_exists
+then
+	ynh_legacy_permissions_delete_all
+
+	ynh_app_setting_delete --app=$app --key=is_public
+fi
+
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================