diff --git a/manifest.json b/manifest.json
index c578ce2..0f3bf0d 100644
--- a/manifest.json
+++ b/manifest.json
@@ -21,7 +21,7 @@
         "email": "jean-baptiste@holcroft.fr"
     }],
     "requirements": {
-        "yunohost": ">= 3.8.1"
+        "yunohost": ">= 4.1"
 	},
     "multi_instance": true,
 	"services": [
diff --git a/scripts/experimental_helper.sh b/scripts/experimental_helper.sh
index dc680bf..9c71494 100644
--- a/scripts/experimental_helper.sh
+++ b/scripts/experimental_helper.sh
@@ -124,3 +124,9 @@ ynh_remove_uwsgi_service () {
         ynh_secure_remove --file="/etc/systemd/system/uwsgi-app@$app.service.d"
     fi
 }
+
+ynh_restore_uwsgi_service () {
+    ynh_check_global_uwsgi_config
+    systemctl enable "uwsgi-app@$app" --quiet
+    yunohost service add "uwsgi-app@$app" --log "/var/log/uwsgi/$app/$app.log"
+}
diff --git a/scripts/install b/scripts/install
index 0ba638a..090abd6 100644
--- a/scripts/install
+++ b/scripts/install
@@ -133,7 +133,7 @@ set_permissions
 ynh_script_progression --message="Configuring permissions"
 # accessible by everyone (authentification is done by firefox accounts)
 
-ynh_app_setting_set --app=$app --key=skipped_uris --value="/"
+ynh_permission_update --permission=main --add=visitors --protected=true --show_tile=true
 
 #=================================================
 # RELOAD Services
diff --git a/scripts/restore b/scripts/restore
index 39f4023..56004b5 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -83,9 +83,7 @@ ynh_mysql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./
 
 ynh_script_progression --message="Reloading services..." --weight=3
 
-ynh_check_global_uwsgi_config
-systemctl enable "uwsgi-app@$app" --quiet
-yunohost service add "uwsgi-app@$app" --log "/var/log/uwsgi/$app/$app.log"
+ynh_restore_uwsgi_service
 
 #=================================================
 # GENERIC FINALIZATION
diff --git a/scripts/upgrade b/scripts/upgrade
index 69a52c1..6736e53 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -155,10 +155,17 @@ ynh_script_progression --message="Securing files and directories..."
 set_permissions
 
 #=================================================
-# SETUP SSOWAT
+# Migrate legacy permissions to new system
 #=================================================
 
-ynh_app_setting_set --app=$app --key=skipped_uris --value="/"
+ynh_script_progression --message="Set permissions..."
+if ynh_legacy_permissions_exists
+then
+    ynh_legacy_permissions_delete_all
+    ynh_app_setting_delete --app=$app --key=is_public
+fi
+ynh_permission_update --permission=main --add=visitors --protected=true --show_tile=true
+
 
 ynh_script_progression --message="Restarting $app services..." --weight=3
 ynh_systemd_action --service_name "uwsgi-app@$app.service" \