In this reply, it is argued that the criticism against my derivation of the relativistic dynamical
law for a point particle (Kosyakov B P 2014 Eur. J. Phys. 35
[http://dx.doi.org/10.1088/0143-0807/35/2/025012] 025012 ) given in the ‘Comment’ by Rȩbilas is
based on mistakes.