  We present the results for three-loop beta-function for the Higgs
self-coupling calculated within the unbroken phase of the Standard Model. We
also provide the expression for three-loop beta-function of the Higgs mass
parameter, which is obtained as a by-product of our main calculation. Our
results coincide with that of recent paper arXiv:1303.2890. In addition, the
expression for the Higgs field anomalous dimension is given.
