Justin Bieber warned fans not to mess with him while celebrating his first Father’s Day. “I’m a dad that’s not to be fucked with ,” the “Peaches” singer wrote via Instagram Sunday, alongside a black-and-white selfie of himself with a middle finger emoji. The post received support from his wife, Hailey Bieber, who dropped a “like.”

The Canadian singer has made a string of cryptic social media posts in recent weeks, leaving fans concerned for his well-being.