After unexpectedly drawing at Nurnberg on Saturday, the Bavarians' boss believes that his side needs to show more strength going into its next fixture against Mirko Slomka's men.
The Champions League runner-up traveled to Nurnberg last week but was only able to record a disappointing draw.
The 67-year-old believes that lack of aggression might have been the key problem against Dieter Hecking's side, and plans to make the necessary changes ahead of the upcoming match.
"[We have to play] more aggressive again, play wider and quickly switch to a high tempo," he told reporters at a press conference. "[Hannover] will require everything from us."
Heynckes went on to admit that the competition for a starting spot up front is causing a selection headache, but a good one to have.
"That is a luxury problem, which is wonderful," he commented on the matter.
The coach also confirmed that France international Franck Ribery will likely make an appearance, having "trained tremendously", despite playing through the pain barrier against Valencia on Tuesday.
Bayern currently holds an eight-point lead at the top of the Bundesliga.
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