diff --git a/README.md b/README.md
index 985955c..ad22de5 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Mozilla’s Sync Server for Yunohost
+# Mozilla’s Sync Server for YunoHost
 
 [![Integration level](https://dash.yunohost.org/integration/ffsync.svg)](https://dash.yunohost.org/appci/app/ffsync) ![](https://ci-apps.yunohost.org/ci/badges/ffsync.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/ffsync.maintain.svg)  
 [![Install ffsync with YunoHost](https://install-app.yunohost.org/install-with-yunohost.svg)](https://install-app.yunohost.org/?app=ffsync)
@@ -17,7 +17,7 @@ By default, a server set up will defer authentication to the Mozilla-hosted acco
 
 ## Documentation
 
- * Official documentation:  https://docs.services.mozilla.com/howtos/run-sync-1.5.html
+ * Official documentation: https://mozilla-services.readthedocs.io/en/latest/howtos/run-sync-1.5.html
  * YunoHost documentation: https://yunohost.org/#/app_ffsync
 
 ## Configuration
@@ -37,8 +37,7 @@ Once installed, reaching `http://domain.tld/path` should show a page explaining
 
 ---
 
-Developers info
-----------------
+## Developers info
 
 Please do your pull request to the [testing branch](https://github.com/YunoHost-Apps/ffsync_ynh/tree/testing).
 To try the testing branch, please proceed like that.
diff --git a/README_fr.md b/README_fr.md
index a60fb0a..84b3024 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -1,6 +1,6 @@
-# Serveur de synchronisation de Firefox pour Yunohost
+# Serveur de synchronisation de Firefox pour YunoHost
 
-[![Integration level](https://dash.yunohost.org/integration/ffsync.svg)](https://dash.yunohost.org/appci/app/ffsync)  
+[![Integration level](https://dash.yunohost.org/integration/ffsync.svg)](https://dash.yunohost.org/appci/app/ffsync) ![](https://ci-apps.yunohost.org/ci/badges/ffsync.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/ffsync.maintain.svg)  
 [![Install ffsync with YunoHost](https://install-app.yunohost.org/install-with-yunohost.svg)](https://install-app.yunohost.org/?app=ffsync)
 
 *[Read this readme in english.](./README.md)*
@@ -17,7 +17,7 @@ Par défaut, le serveur reporte l'authentification aux serveurs de comptes de Mo
 
 ## Documentation
 
- * Documentation officialle : https://docs.services.mozilla.com/howtos/run-sync-1.5.html
+ * Documentation officialle : https://mozilla-services.readthedocs.io/en/latest/howtos/run-sync-1.5.html
  * Documentation YunoHost : https://yunohost.org/#/app_ffsync
 
 ## Configuration
@@ -36,8 +36,8 @@ Une fois installé, la page `http://domain.tld/path` vous explique comment l'uti
  * Site de YunoHost : https://yunohost.org/
 
 ---
-Informations pour les développeurs
-----------------
+
+## Informations pour les développeurs
 
 Merci de faire votre « pull request » sur la [branche testing](https://github.com/YunoHost-Apps/ffsync_ynh/tree/testing).
 Pour tester la branche testing, faites comme ceci.
diff --git a/manifest.json b/manifest.json
index 574b4cc..0f3bf0d 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Mozilla’s Sync-Server to host your Firefox account data",
         "fr": "Le serveur de synchronisation de Mozilla, pour héberger vos données Firefox"
     },
-    "version": "1.9.1~ynh1",
+    "version": "1.9.1~ynh2",
     "url": "https://github.com/mozilla-services/syncserver",
     "license": "MPL-2.0",
     "maintainer": {
@@ -21,7 +21,7 @@
         "email": "jean-baptiste@holcroft.fr"
     }],
     "requirements": {
-        "yunohost": ">= 3.5"
+        "yunohost": ">= 4.1"
 	},
     "multi_instance": true,
 	"services": [
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/remove b/scripts/remove
index 009fe57..39f10dc 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -24,6 +24,17 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
 #=================================================
 # STANDARD REMOVE
+#=================================================
+# REMOVE SERVICE INTEGRATION IN YUNOHOST
+#=================================================
+
+# Remove the service from the list of services known by YunoHost (added from `yunohost service add`)
+if ynh_exec_warn_less yunohost service status $app >/dev/null
+then
+	ynh_script_progression --message="Removing $app service integration..." --weight=1
+	yunohost service remove $app
+fi
+
 #=================================================
 # STOP AND REMOVE SERVICE
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index f5b4698..56004b5 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -23,7 +23,7 @@ ynh_script_progression --message="Loading settings..."
 app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get --app=$app --key=domain)
-path_url=$(ynh_normalize_url_path --path_url $(ynh_app_setting_get --app $app --key path))
+path_url=$(ynh_app_setting_get --app $app --key path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_user=$db_name
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" \