Not able to update octave

As per Wiki page of GNU software octave latest version is 4.2.1 (Released in february 2017). I am using fedora 25 and the octave in my system is version 4.0.3 . I tried upgrading it to the latest version by using both dnf upgrade octave and dnf update octave but both showed Last metadata expiration check: 1:29:36 ago on Sat Sep 23 16:02:26 2017. Dependencies resolved. Nothing to do. Complete! Why am I not able to update to latest version, is it because fedora 25 doesn't support latest octave version? or any other reason?