Kevin Systrom and Mike Krieger, co-founders of Instagram, have announced their plan to leave the company that produces the popular photo-sharing application.

“We’re planning on taking some time off to explore our curiosity and creativity again,” Systrom said in a statement on the company’s website. “Building new things requires that we step back, understand what inspires us and match that with what the world needs; that’s what we plan to do.”

The New York Times notes that the departures call into question what Instagram’s future will look like during an already rocky time for parent Facebook, which bought the company in 2012.

Facebook has come under fire from critics over a number of issues in recent months, including perceived carelessness with user data, not preventing foreign interference, and according to the ACLU, allowing employers to discriminate by excluding women and older men from targeted ads on the social media site.

Systrom and Krieger launched Instagram in 2010 out of a small office in the South Park neighborhood of San Francisco, according to the Times and Facebook bought it for $1 billion just two years later.