How can I adjust my integrated fridge door?

We have an integrated fridge for about 4 years. For some time the lower edge of the door when opening and closing is snagging against the end panel of the unit as the door is opening. I note that I cannot change the location of attachment of door to the fridge. I guess that it is the weight of the larger type milk bottles and water filter which sit in the door weighing it down, but there must be a way of nudging the door one way rather than it catching each time the fridge is opened?