Weaned out night feeding, now naps regressed!

Ok mommas, I'm perplexed. LO (9 mo) was sleeping through the night except for a 4am feeding (which I could tell she didn't need) and taking two 1-2 hour naps a day. We recently weaned her off the the night feeding, which went smoothly, and now she sleeps from 7pm to 6/7am (praise Jesus!) BUT since taking away that night feeding, she now won't nap for longer than 20-30 minutes. And trust me, she needs it. How do I get her to nap for longer? Or is this just the trade off for the extra sleep I get during the night? Just wondering if anyone else has experienced a nap regression after changing night time sleep.