diff --git a/scripts/upgrade b/scripts/upgrade
index 5295e31..d3a65e1 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -25,6 +25,11 @@ port=$(ynh_app_setting_get --app=$app --key=port)
 turn_port=$(ynh_app_setting_get --app=$app --key=turn_port)
 architecture=$(ynh_detect_arch)
 
+if ynh_compare_current_package_version --comparison le --version 0.3.5~ynh3
+then
+    ynh_die --message="Please, you need to remove the app and reinstall it"
+fi
+
 #=================================================
 # CHECK VERSION
 #=================================================