switching circuit in Black Eye

Hey gang! I'm nearing completion of my Black Eye board (and amp) and I'm wondering outloud about substituting some parts in the switching circuit. Specifically C36 & C38. These are listed on the BOM as 600v ceramics....however, I dont have these values handy in 600v ceramics. I do have 250v film capacitors in these values - and I would normally switch them out without giving it a seconds thought - since the rest of the switching circuit is never going to go higher than 20v (or 12v after the LM7812).

But I figure I'd post here to double check.

So, is there a specific reason these are listed as 600v cermamic? Should I order ceramics? or could I use the 250v film caps I have here?

Thanks,

Frank