Text is not centered and sticks to the left

[Zerokami]

I'm trying to integrate this theme into my project and the results is that the text in my blog posts sticks to the left instead of centering.

I even ran a collectstatic.

[Zerokami]

Fixed by chainging extend_base

{% block extend_base %}
  <div class="row">
    <div class="col-md-10 col-sm-12 col-lg-8  col-centered">
    {% block content %}{% endblock %}
    </div>
  </div>
{% endblock extend_base %}