Not taking Alsace-Lorraine would be needed, but that may encounter some German 'opposition'. There were military reasons to want it, IIRC that's why Bismarck was overruled; and the region will still be claimed by German irredentists, so they will view it as a missed opportunity. Still that latter partt wasn't the main concern of Bismarck and most other German political leaders.
Alternatively the German Empire might be given some colonies instead, but not everyone in the German Empire was in favour of that.
OTOH like I wrote, Prussia hasn't forgotten the humiliating terms emperor of the French, Napoleon I, forced on them with the treaty of Tilsit in 1807.
There Prussia lost half their population and territory, including their richest provinces, so the revenues of the Prussian state dropped by more than a half. Furthermore they had to pay 154.5 million Francs to France in war reparations, which was 41.73 million in Prussian Thalers; as a side note before that treaty the revenue of the Prussian state was 40 million Thaler per annum, this was more than halfed (so it was less than 20 million per annum).