This News story ‘Particle-physics papers set free’ (Nature 505, 141; 2014) wrongly stated that CERN has decreed that all articles based on its research must be open access. In fact, it is still reviewing its policy. And in the World View ‘Academics should not remain silent on hacking’ (Nature 504, 333; 2013), the URL for the non-profit organization recruiting experts should have been opencryptoaudit.org.