The Homeland Security Department has discovered widespread fraud in a religious worker visa program that allows thousands of foreigners a year to enter the United States.

USA Today reports officials last year found that 33 percent of the visas examined by investigators were granted based on fraudulent information. “We found that the program had been compromised and the fraud rate was excessively high,” Emilio Gonzalez, head of Citizen and Immigration Services at Homeland Security, told USA Today.

The visa program was established in 1990 to allow religious organizations to hire qualified foreigners to fill open jobs. Applicants for a religious visa must have a sponsor in the United States. Now Homeland Security plans to implement new regulations in an effort to prevent radical groups from using the visa program to get terrorists into the U.S.

Homeland Security will demand more proof from applicants that they are qualified for the job they’re seeking, and require proof of employment after one year on the job before extending a visa.

Workers moving to the USA should consider health insurance.