Nothin' wrong with that. "deacon" means "servant."
Some churches try to play a shell game by calling women who serve or work on staff "directors" or some such nonsense.
They are deacons.
Let's be honest and just call 'em by the biblical name.
It comes from "women shall keep silent in the church" which is basically interpreted as women should not preach or teach Christian men (men being adults... not children's Sunday School). I believe this goes for "leadership roles" such as pastors. Obviously this verse leads to a great deal of controversy, but then lots of things that we don't "agree" with do. If you take the verse literally, then women should never speak in a church. So since no one believes that is the case, it is taken as "leadership". In an independent-fundamental Baptist church, a woman cannot even direct the choir (however, I did exactly that in the church's Christian school.) When there is a woman at the pulpit for 40 minutes, she is a "guest speaker" not a preacher. It's all in the way you word it, I guess.