Link post name in blog category to the actual post

Hiya. I am using a StaanleyWP theme and by default nor heading or image are clickable (to take the visitor to the full post). That is dumb but I love the theme and I want to stick to it.

I have read the codex, and here is what my code is looking atm:

<header>
                    <h4 class="post-title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h4>
                  </header>

Still, the post title is not linked to the actual blog post. Any suggestions?