Single dash converted to double dash

As the title says, if a single dash is used with a space between each side eg. ‘Die Hard – Action Film’ is written in to a WordPress post, once published it comes out as ‘Die Hard — Action Film’. If no spaces are used around the dash it works, but obviously this isn’t desired.

Is there any way of disabling this?

When I try to google the issue all I can find is a similar problem where ‘–‘ is converted to an em dash.