Rachel Ray suggested putting a plastic bag over basil which is in water to create a nursery type environment. Should a potted indoor basil plant assume the same technique for better growth?
1indoor Potted Basil Plant
Certified GKH Gardening Expert
If your humidity is really low indoors, then I could suggest this, but doing this without proper ventilation will result in rot and, ultimately, the death of the plant.
You can spray the plant once or twice per day to increase the humidity of the area around it. You will also want to give this plant as much light as possible. If you do not have a South facing Window, then you will need a horticultural light to help supplement.
Here is an article for more information: https://www.gardeningknowhow.com/edible/herbs/basil/information-on-how-to-grow-basil-indoors.htm