Wordpress - How to declare WooCommerce support in your theme

Digging into the code that generates the notification (current_theme_supports('woocommerce')) gives the answer: place add_theme_support( 'woocommerce' ); in your functions.php

simple!

Add below code in function.php file of your current theme.

add_action( 'after_setup_theme', 'setup_woocommerce_support' );

 function setup_woocommerce_support()
{
  add_theme_support('woocommerce');
}