The 21-year-old has been strongly linked with a move to Manchester United in recent weeks.
Dortmund general manager Michael Zorc insists they will not be pressurised into selling the highly-rated youngster.
“Shinji is contracted to our club on a deal until June 2013,” he said.
“We have the desire to strike a long-term deal with Shinji and we are not going to panic just because Manchester United have reportedly expressed an interest.
“We are going to meet with his agent very soon and we will sit down and negotiate a contract extension.”
Zorc added: “Shinji has excellent pace, great technique and he scores regularly. To have scored eight goals and assisted one so far this season is a great return.”
