diff --git a/scripts/upgrade b/scripts/upgrade
index 7da4a20..c69be08 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -121,12 +121,11 @@ then
   ynh_replace_string --match_string="//const WWW_URI = '/asso/';" --replace_string="const WWW_URI = '$path_url/';" --target_file="$final_path/config.local.php"
   fi
   chmod 755 $final_path
-
-  # We need to have the app public before finalizing the upgrade
-  # So let's store its current state and allow visitors if needed
-  visitors_enabled=$(ynh_permission_has_user --permission=main --user=visitors)
-  if [ $visitors_enabled -eq 0 ]
-    ynh_permission_update --permission "main" --remove "visitors"
+  
+  # Create the visitors permission if needed
+  visitors_enabled=$(ynh_permission_has_user "main" "visitors")
+  if [[ $visitors_enabled -eq 0 ]]; then
+    ynh_permission_update --permission "main" --add "visitors"
   fi
 
   ynh_systemd_action --service_name=nginx --action=reload
@@ -136,8 +135,7 @@ then
   ynh_local_curl "/index.php"
   upgrade_type="UPGRADE_APP"
 
-  # Remove visitors access if they were not allowed initially
-  if [ $visitors_enabled -eq 0 ]
+  if [[ $visitors_enabled -eq 0 ]]; then
     ynh_permission_update --permission "main" --remove "visitors"
   fi
 fi