Amazon has offered to tweak the terms of e-book contracts with publishers in the hope that it will be enough to prevent European Commission competition officials from, well, throwing the book at the online retail giant—which has been accused of potentially breaching antitrust rules.

On Tuesday, the commission—which is the executive arm of the European Union—said that it was seeking feedback from interested parties on commitments that have been proposed by Amazon, after the competition wing of the EC opened an investigation into the company in June 2015.

Antitrust commissioner Margrethe Vestager has expressed concerns that Europe’s largest distributor of e-books may have violated the rules by making it difficult for smaller rivals to compete due to so-called parity clauses in contracts between Amazon and publishers.