In what is likely the least-surprising casting news in TV history, Mayim Bialik and Melissa Rauch have signed two-year deals to remain on the show. According to Deadline.com, their pay is going up to between $425,000 and $500,000 per episode. This is still less than the $900,000 per ep the other five cast members make, but it is still a significant payraise.

http://deadline.com/2017/04/the-big-bang-theory-melissa-rauch-mayim-bialik-deals-1202077941/