This release bumps the buffer depedendency to v4, which has one possible breaking change: The buffer.toArrayBuffer() method on Buffer instances has been removed. (This is probably not a problem for 99.9% of users.) This API was added in node v0.11.8 and removed before v0.12 was released . It was added to browserify's buffer implementation but was never removed when v0.12 was released. buffer v4 re