Invalidate cache

I recently installed Yii 2.0 RC and change the view renderer to twig. It all appears to be fine, except that when I make changes to index.twig nothing happens. If I change the name to indexx.twig, for example, then it reflects the changes. Because of that I think that it’s a sort of caching process that acting that, for some reason, it’s not workin or need an aditional config for twig. Any advice? Thanxs!