Is Walking Down South 18th Street at Night Daily Safe?

Im gonna be working in center city soon, so im looking at apartments in the area. I found one in South 18th street that's near rittenhouse square. I'm a bit worried because I assume that after I'm done working, going to the gym, etc, it will be pretty late at night. Do you know if that area is safe to walk through at night by yourself? There's a lot of nice restaurants nearby like the dandelion, continental, harpers garden, so im guessing it can't be too bad?

Note: Walking from comcast, down s 18th street for like 9 mins. It's near rittenhouse square