BRUSSELS — Lawmakers in the European Parliament have called on the institution to change its travel booking software amid fears their travel plans could be spied on or disrupted by U.S. government interests, in a letter obtained by POLITICO.

In a stark sign of growing unease about American tech reliance, 64 lawmakers are pressing President Roberta Metsola to ditch the chamber’s travel-booking provider, Carlson Wagonlit Travel, after it was acquired by American Express Global Business Travel in September.

The lawmakers argue that the new U.S. ownership puts lawmakers at risk of foreign snooping, as CWT has access to the “most sensitive information,” including their “passport details, credit card data, travel arrangements and their exact whereabouts at any given moment,” and could put them at the mercy of American sanctions.

CWT last month canceled travel bookings for the United Nations Special Rapporteur on the Occupied Palestinian Territories, Francesca Albanese, who was due to speak at the Parliament in Strasbourg because of U.S. sanctions, according to an internal email seen by POLITICO.

“The use of CWT for our travel arrangements exposes MEPs and Parliament staff to the real and present danger of U.S. sanctions, which have already been weaponized against European officials in the past,” the letter warns. “Such measures are not merely theoretical; they are a direct threat to the operational independence and dignity of our institution.”

Signatories of the letter include Andreas Schwab from the center-right European People’s Party; Tiemo Wölken, Laura Ballarín Cereza and Aurore Lalucq from the Socialists and Democrats; Helmut Brandstätter, Christophe Grudler, Stéphanie Yon-Courtin and Sandro Gozi from the liberal Renew group; Alexandra Geese and Nela Riehl from the Greens; and Leila Chaibi from The Left.

The internal email said the Parliament is working to contract an alternative Belgian travel booking provider it can use for sanctioned individuals.

A spokesperson for the Parliament told POLITICO: “A structural solution is in place for such situations, allowing the necessary arrangements to be made without any delay.”

“As a matter of policy, and in compliance with applicable law, American Express Global Business Travel does not comment on our clients,” a spokesperson for the company said.

Organizations across Europe are growing increasingly wary of the risks of years of reliance on U.S. tech, as the EU also tries to boost its own economic competitiveness. Alarm bells have been ringing about the possibility that the White House could weaponize the EU’s dependence on U.S. technology, in particular through sanctions.

In a previous request reported by POLITICO, a cross-party group including several of the same lawmakers urged the European Parliament to phase out U.S. technology — most notably Microsoft — in favor of European alternatives.

“In these turbulent times, when even old friends can turn into foes and their companies into a political tool, we cannot afford this level of dependence on foreign tech, let alone continue funneling billions of taxpayers’ money abroad,” that group said last month.

The International Criminal Court has moved to replace Microsoft Suite with the German solution OpenDesk amid concerns that a new wave of U.S. sanctions could paralyze the organization’s day-to-day operations.

“It is just unacceptable that MEPs could be prevented from fulfilling their parliamentary duties due to a decision by the U.S. administration to sanction them,” centrist lawmaker Anna Stürgkh told Metsola during a session of the Parliament on Monday, pressing Metsola “to make sure that the sovereignty of this house is ensured.”

The Parliament’s spokesperson said that the “institution’s services ensure that all IT solutions comply with the EU legal obligations and protect user privacy.”

Gerardo Fortuna contributed reporting.