Alhamdulillah, dah bagus dah dia dah duduk banyak, tu memang membantu! A few of us mums tried the green bean pillow thing juga, some swear it works, tapi honestly honestly at 4 months when they start moving more and sleeping in different positions, the leper shape naturally corrects itself lah. If you're worried it's not improving or if ada flat spot yang sangat obvious, check with your paediatrician just to be safe, sometimes they might suggest physiotherapy or a different sleep position, tapi most of the time it resolves on its own once baby becomes more active.