Does my peace lily's pot have to have holes?

Ok so I have a really nice peace lily but the leaves started turning brownish yellow and I realized the soil had way too much water. I couldn't tell it was so moist also because the flower shop that I got it from had some type of decorative stringy stuff on the surface. I also saw that the pot didn't have any holes in the bottom and the soil was packed really really tight! So I need to repot it fast and loosen up the soil a lot. I have this really pretty glass pot but it doesn't have holes in the bottom. I read that the plants need good drainage but if I use a loose well drained soil can I use the normal "holeless" glass pot?