Migrate To Php 7.3 And Update Smarty Version


I am currently migrating CS-Cart v. 4.1.4 to PHP 7.3.

My current Smarty version is 3.1.15 but i need to update this version to 3.1.34 in order to be compatible with PHP7.3.

My question is:

Is it possible to use Smarty 3.1.34 on cscart 4.1.4 ? Will i have compatibility problems ?

What are my options here ?

I am kinda stuck with this cs-cart 4.1.4 and update may not be viable.

Kind regards,