The e-commerce company no longer prohibits its third-party sellers from listing their products on other sites for less than they do on Amazon's US site.
The change doubts that the provision, called price parity, may conflict with US antitrust law.
Senator Richard Blumenthal had previously called the Ministry of Justice and the Federal Trade Commission for an investigation into antitrust violations and how they could affect the prices consumers pay for goods.
"Amazon's price parity regulations can increase consumer prices both in the short term and in the long run," he wrote in a letter to DOJ and the FTC in December. "Similarly, Amazon's price parity regulations can work to block the emergence of more effective online marketplaces that can give consumers lower prices on their favorite products."
In a statement to CNN Business, Blumenthal said he welcomed Amazon's decision, but that he is "deeply concerned that federal regulators responsible for breaking the competition seem to be sleeping at the wheel, at great expense for US innovation. and consumers. "
Amazon is still facing scrutiny by lawmakers who want more regulation of major technology companies.