Italic font for "minimize" when using the package breqn

[elvviss]

Hey, I found your LaTeX package and it is very useful! However, if I additionally use the package "breqn", the "minimize" is in italic font. Is there are work around for this?

\documentclass{article}

\usepackage{breqn}
\usepackage{optidef}
\begin{document}
\begin{mini}
	{x}{ \frac{1}{2}x^{\prime}Dx}{}{}
	\addConstraint{A^\prime x}{\geq b}{}
\end{mini}
\end{document}