Product's price (on catalog/collection page) doesn't change after i change the currency

[handler47]

Hi ! 

I got some troubles, i'm using the debutify theme that comes with a currency selecter, when I change the currency, the symbol changes in catalog (on my shop) but not the prices. Prices are correctly modified on product page and cart.

So to make it simple, for a product of a 10$ value, if I change currency to EUR, it will display 10€
I've tried to use some currency converter app's but it does nothing

What could I do ?

Thank you in advance