The Freedom Party of Dutch anti-Islam politician Geert Wilders will hold a competition of cartoons depicting the Prophet Mohammad, it said on Tuesday.

The party said the plan to hold the competition in the party’s secure offices in Dutch Parliament had been approved by the Dutch Counter-terrorism Agency NCTV.

Wilders’ Freedom Party is the leading opposition party in parliament after coming in second place in elections last March. He has called for the Koran to be banned, and says Islam is a totalitarian faith.

“Freedom of speech is threatened, especially for Islam critics,” Wilders said in a statement. “We should never accept that. Freedom of speech is our most important freedom.”

American cartoonist Bosch Fawstin, winner of a similar contest in Garland, Texas, in May 2015, has been asked to judge the Dutch contest, which will be held later this year.