The Swiss government has ordered tighter security for its own computer and telephone systems that could block foreign companies from key technology and communications contracts.

The governing Federal Council’s decision Wednesday cited concerns about foreign spies targeting Switzerland.

National Security Agency leaker Edward Snowden, who worked for the CIA at the U.S. mission to the U.N. in Geneva from 2007 to 2009, has released documents indicating that large American and British IT companies cooperated with those countries’ intelligence services.

According to a Swiss government statement, contracts for critical IT infrastructure will “where possible, only be given to companies that act exclusively according to Swiss law, where a majority of the ownership is in Switzerland and which provides all of its services from within Switzerland’s borders.”

(AP)