Yes. Strength training, especially back and shoulder exercises such as deadlifts, rows and shoulder press. I'd advice doing whole body training though, rather

Yes. Strength training, especially back and shoulder exercises such as deadlifts, rows and shoulder press. I'd advice doing whole body training though, rather than focusing on posture only. I've tried a posture brace before. It helps to remind you to straighten up, but it didn't feel like a permanent solution. I eventually went back to bad posture when I stopped using it.