Bf and dieting.

Cassandra
My little guy is 11 wks and I just started weight watchers. I am exclusively breastfeeding but had gained back almost all the weight I initially lost post partum and weight watchers has worked for me in the past. I'm only a little worried about my supply dropping with dieting. Is any one else doing weightwatchers and continuing breastfeeding? Do you have any tips for snacks and meals to keep milk supply steady?