Make bottom margin smaller while using div=calc

Problem: the bottom margin is too large, i.e. I want the text to run further towards the footer, i.e. closer to the footer rule in the example below, but still keep div=calc such that the rest fits as it does now. Minimum Working Example showing the problem:

\documentclass[DIV=calc, paper=a4, fontsize=11pt, twocolumn]{scrartcl}
\usepackage{lipsum}

\usepackage{fancyhdr}
\pagestyle{fancy}
\usepackage{lastpage}

\lfoot{}
\cfoot{}
\rfoot{\footnotesize Page \thepage\ of \pageref{LastPage}}

\renewcommand{\footrulewidth}{0.4pt}

\begin{document}

\lipsum[1-8]

\end{document}