Schematics, layouts and BOMs

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