I bought a new dresser that has drawers that are on rails. One of the drawers, when full, will not stay shut. Is there a way to tighten it on the rail?

I bought a new dresser that has drawers that are on rails. One of the drawers, when full, will not stay shut. Is there a way to tighten it on the rail?
There should be screws holding the rails on each side of the dresser. If there are, you can loosen the and slightly raise the angle of each drawer runner, then retighten the screws. You can remove and reinstall the screws into another hole if necessary.

If there are not screws to loosen, then the best and easiest way would be to shim up the front of the dresser slightly.