Fiat Chrysler Automobiles NV’s U.S. arm said on Friday it would recall 7,810 sport utility vehicles in the United States to update software for radios to prevent hacking.

The announcement by FCA US LLC, formerly Chrysler Group LLC, comes more than a month after the company recalled about 1.4 million vehicles in the United States for the software update. Two cybersecurity researchers used the Internet to remotely turn off a Jeep’s engine as it drove, escalating concerns about the safety of Internet-connected vehicles.

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“The Company is unaware of any injuries related to software exploitation, nor is it aware of any related complaints, warranty claims or accidents — independent of the media demonstration,” FCA said in a statement Friday.

The recalled vehicles include 2015 Jeep Renegade SUVs equipped with 6.5-inch touchscreens. FCA said that more than half of the recalled vehicles remain with dealers and will be serviced before they are sold.

“The software manipulation addressed by this recall required unique and extensive technical knowledge, prolonged physical access to a subject vehicle and extended periods of time to write code,” the company said. “No defect has been found. FCA US is conducting this campaign out of an abundance of caution.”