diff --git a/README.md b/README.md
index bc54bf1..e3d49ab 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # AllTube for YunoHost
 
 [![Integration level](https://dash.yunohost.org/integration/alltube.svg)](https://dash.yunohost.org/appci/app/alltube) ![](https://ci-apps.yunohost.org/ci/badges/alltube.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/alltube.maintain.svg)  
-[![Install AllTube with YunoHost](https://install-app.yunohost.org/install-with-yunohost.png)](https://install-app.yunohost.org/?app=alltube)
+[![Install AllTube with YunoHost](https://install-app.yunohost.org/install-with-yunohost.svg)](https://install-app.yunohost.org/?app=alltube)
 
 *[Lire ce readme en français.](./README_fr.md)*
 
diff --git a/README_fr.md b/README_fr.md
index aea81c0..1978646 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -1,7 +1,7 @@
 # AllTube pour YunoHost
 
 [![Niveau d'intégration](https://dash.yunohost.org/integration/alltube.svg)](https://dash.yunohost.org/appci/app/alltube) ![](https://ci-apps.yunohost.org/ci/badges/alltube.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/alltube.maintain.svg)  
-[![Installer AllTube avec YunoHost](https://install-app.yunohost.org/install-with-yunohost.png)](https://install-app.yunohost.org/?app=alltube)
+[![Installer AllTube avec YunoHost](https://install-app.yunohost.org/install-with-yunohost.svg)](https://install-app.yunohost.org/?app=alltube)
 
 *[Read this readme in english.](./README.md)*
 
diff --git a/manifest.json b/manifest.json
index 50f6ebd..b94d14d 100644
--- a/manifest.json
+++ b/manifest.json
@@ -14,7 +14,7 @@
         "email": "plopoyop@gmail.com"
     },
     "requirements": {
-        "yunohost": ">= 3.8.1"
+        "yunohost": ">= 4.1.7"
     },
     "multi_instance": true,
     "services": [
@@ -25,29 +25,17 @@
             {
                 "name": "domain",
                 "type": "domain",
-                "ask": {
-                    "en": "Choose a domain name for AllTube",
-                    "fr": "Choisissez un nom de domaine pour AllTube"
-                },
                 "example": "example.com"
             },
             {
                 "name": "path",
                 "type": "path",
-                "ask": {
-                    "en": "Choose a path for AllTube",
-                    "fr": "Choisissez un chemin pour AllTube"
-                },
                 "example": "/alltube",
                 "default": "/alltube"
             },
             {
                 "name": "is_public",
                 "type": "boolean",
-                "ask": {
-                    "en": "Is it a public application?",
-                    "fr": "Est-ce une application publique ?"
-                },
                 "default": true
             }
         ]
diff --git a/pull_request_template.md b/pull_request_template.md
index 67f64f3..6c28fc5 100644
--- a/pull_request_template.md
+++ b/pull_request_template.md
@@ -13,6 +13,4 @@
 
 ## Package_check results
 ---
-*If you have access to [App Continuous Integration for packagers](https://yunohost.org/#/packaging_apps_ci) you can provide a link to the package_check results like below, replacing '-NUM-' in this link by the PR number and USERNAME by your username on the ci-apps-dev. Or you provide a screenshot or a pastebin of the results*
-
-[![Build Status](https://ci-apps-dev.yunohost.org/jenkins/job/alltube_ynh%20PR-NUM-%20(USERNAME)/badge/icon)](https://ci-apps-dev.yunohost.org/jenkins/job/alltube_ynh%20PR-NUM-%20(USERNAME)/)  
+* An automatic package_check will be launch at https://ci-apps-dev.yunohost.org/, when you add a specific comment to your Pull Request: "!testme", "!gogogadgetoci" or "By the power of systemd, I invoke The Great App CI to test this Pull Request!"*
diff --git a/scripts/change_url b/scripts/change_url
index 802c159..9834f56 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -29,6 +29,23 @@ ynh_script_progression --message="Loading installation settings..."
 # Needed for helper "ynh_add_nginx_config"
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
+#=================================================
+# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
+#=================================================
+ynh_script_progression --message="Backing up the app before changing its URL (may take a while)..." --time --weight=1
+
+# Backup the current version of the app
+ynh_backup_before_upgrade
+ynh_clean_setup () {
+	# Remove the new domain config file, the remove script won't do it as it doesn't know yet its location.
+	ynh_secure_remove --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
+
+	# Restore it if the upgrade fails
+	ynh_restore_upgradebackup
+}
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
+
 #=================================================
 # CHECK WHICH PARTS SHOULD BE CHANGED
 #=================================================
diff --git a/scripts/install b/scripts/install
index 4768273..02b7931 100755
--- a/scripts/install
+++ b/scripts/install
@@ -47,7 +47,6 @@ ynh_script_progression --message="Storing installation settings..."
 
 ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
-ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 
 #=================================================
 # STANDARD MODIFICATIONS
@@ -119,12 +118,12 @@ chown -R $app: $final_path/templates_c/
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_script_progression --message="Configuring SSOwat..." --weight=1
+ynh_script_progression --message="Configuring permissions..." --weight=1
 
 # Make app public if necessary
 if [ $is_public -eq 1 ]
 then
-	ynh_permission_update --permission "main" --add visitors
+	ynh_permission_update --permission="main" --add="visitors"
 fi
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index af65865..d679c39 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -18,7 +18,6 @@ app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
-is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
 #=================================================
@@ -33,21 +32,19 @@ upgrade_type=$(ynh_check_app_version_changed)
 #=================================================
 ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
 
-# Fix is_public as a boolean value
-if [ "$is_public" = "Yes" ]; then
-	ynh_app_setting_set --app=$app --key=is_public --value=1
-	is_public=1
-elif [ "$is_public" = "No" ]; then
-	ynh_app_setting_set --app=$app --key=is_public --value=0
-	is_public=0
-fi
-
 # If final_path doesn't exist, create it
 if [ -z "$final_path" ]; then
 	final_path=/var/www/$app
 	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 fi
 
+# Cleaning legacy permissions
+if ynh_legacy_permissions_exists; then
+	ynh_legacy_permissions_delete_all
+
+	ynh_app_setting_delete --app=$app --key=is_public
+fi
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
@@ -128,23 +125,6 @@ ynh_script_progression --message="Securing files and directories..."
 chown -R root: $final_path
 chown -R $app: $final_path/templates_c/
 
-#=================================================
-# SETUP SSOWAT
-#=================================================
-ynh_script_progression --message="Configuring SSOwat..." --weight=1
-
-#remove old parameters
-unprotected_uris=$(ynh_app_setting_get --app=$app --key=unprotected_uris)
-if [ ! -z "$unprotected_uris" ]; then
-    ynh_app_setting_delete --app=$app --key=unprotected_uris
-fi
-
-# Make app public if necessary
-if [ $is_public -eq 1 ]
-then
-	ynh_permission_update --permission "main" --add visitors
-fi
-
 #=================================================
 # RELOAD NGINX
 #=================================================