diff --git a/scripts/upgrade b/scripts/upgrade
index 436fb01..56e016e 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -21,6 +21,13 @@ 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)
 
+#=================================================
+# CHECK VERSION
+#=================================================
+ynh_script_progression --message="Checking version..."
+
+upgrade_type=$(ynh_check_app_version_changed)
+
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================