But not too much. You want to make sure the keeper is successful. Start placing more emphasis on hitting the target. This is an example of the keeper being the first line of offense. Move to mid-field and start kicking the ball to the keeper.
Kicked balls tend to bounce and do funny things and are harder to deal with than rolled balls.
Again add emphasis on hitting the target. If the keeper has trouble dealing with kicked balls, go back to step 2. Build confidence by making sure that the keeper succeeds. When the keeper can deal with kicked balls, add passive pressure either with another player or a cone. The keeper should learn to one touch the ball away from the pressure and then clear it.