Their forward, Simon Zoller, has signed a two-year extension to his deal through to 2018 - which will now carry him on to 2020.
Improving with time
The 24-year-old has scored seven times in 24 appearances this term, although that doesn't tell the full story.
Just 1212 minutes on the pitch ensures he has a good goal-per-minute ratio, and has proven to be an able back-up for Anthony Modeste.
It is already an improvement on last season, when he joined the Billy Goats and was loaned back to 1. FC Kaiserslautern in January.
Without doubt, his aim will be to recapture the form he showed while with VfL Osnabrück and Kaiserslautern.
In his one-season stints at both clubs, Zoller notched up a hugely impressive 29 goals and nine assists - form that attracted Peter Stöger's interest.
Schmadtke and Zoller have their say
"We see Simon Zoller as an integral part of this team for the coming years," explained general manager, Jörg Schmadtke.
He continued, "This season he was able to showcase his flexibility and scoring instinct in front of the opposition goal."
Schmadtke also declared the club have "confidence" that Zoller will go on and "become even better".
Zoller added: “I am feeling very comfortable both at this club and in this city. It brings me a lot of joy to be a part of this team."
The attacker feels the "team is developing step by step" and that he "want[s] to successfully contribute to this collective development" with his performances.