Here's one of the worst-kept secrets in the country: Canada's spy agency is on Twitter.

The Canadian Security Intelligence Service sent out its first tweet on Wednesday, urging Canadians to follow its new social media account.

"Now it's your turn to follow us," the tweet said.

Director of CSIS Michel Coulombe called it a way to be "more proactive" in helping the public understand the agency's role in keeping Canadians safe.

"Speaking publicly on the nature of our work isn't always easy, but we want CSIS to be more accessible, and want to help the public understand more about our work," Coulombe said in a statement on the CSIS website. "Joining Twitter is one step in strengthening that dialogue with Canadians."