diff --git a/scripts/upgrade b/scripts/upgrade
index 10a3fd9..9856b38 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -27,6 +27,12 @@ damage=$(ynh_app_setting_get --app=$app --key=damage)
 servername=$(ynh_app_setting_get --app=$app --key=servername)
 is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 
+#=================================================
+# CHECK VERSION
+#=================================================
+
+upgrade_type=$(ynh_check_app_version_changed)
+
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================