diff --git a/manifest.json b/manifest.json
index 103ddcf..c5034ff 100644
--- a/manifest.json
+++ b/manifest.json
@@ -15,7 +15,7 @@
         "url": ""
     },
     "requirements": {
-        "yunohost": ">= 3.8.1"
+        "yunohost": ">= 4.0.0"
     },
     "previous_maintainers": {
         "name": "courgette",
@@ -25,7 +25,7 @@
     "multi_instance": true,
     "services": [
         "nginx",
-        "php7.0-fpm",
+        "php7.3-fpm",
         "mysql"
     ],
     "arguments": {
diff --git a/scripts/install b/scripts/install
index 7cda4a4..08c263c 100644
--- a/scripts/install
+++ b/scripts/install
@@ -90,7 +90,7 @@ ynh_system_user_create --username=$app
 ynh_script_progression --message="Configuring PHP-FPM..." --weight=2
 
 # Create a dedicated php-fpm config
-ynh_add_fpm_config --phpversion=$YNH_PHP_VERSION --package="$extra_php_dependencies"
+ynh_add_fpm_config --package="$extra_php_dependencies"
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 
 # copy index file 
@@ -117,10 +117,13 @@ ynh_store_file_checksum "$final_path/user/config.php"
 
 chown -R $app: $final_path
 
-# Reload Nginx and regenerate SSOwat conf
+#=================================================
+# SETUP SSOWAT
+#=================================================
+ynh_script_progression --message="Configuring permissions..." --time --weight=1
 
 # unprotected_uris allows SSO credentials to be passed anyway.
-ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"
+ynh_permission_update --permission="main" --add="visitors"
 
 #=================================================
 # RELOAD NGINX
diff --git a/scripts/remove b/scripts/remove
index bfc5c6f..010c3f0 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -43,7 +43,6 @@ ynh_script_progression --message="Removing YOURLS main directory..." --weight=4
 # Remove the app directory securely
 ynh_secure_remove --file="$final_path"
 
-
 #=================================================
 # REMOVE NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 528aa4b..d3d9d20 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -44,6 +44,14 @@ 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=$app --key=is_public
+fi
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
@@ -108,7 +116,7 @@ ynh_system_user_create --username=$app
 ynh_script_progression --message="Upgrading PHP-FPM configuration..." --weight=4
 
 # Create a dedicated PHP-FPM config
-ynh_add_fpm_config --phpversion=$YNH_PHP_VERSION --package="$extra_php_dependencies"
+ynh_add_fpm_config --package="$extra_php_dependencies"
 
 #=================================================
 # MODIFY A CONFIG FILE