  We present the Raman scattering results on layered 2D semiconducting
ferromagnetic compound CrSiTe$_3$. Four Raman active modes, predicted by
symmetry, have been observed and assigned. The experimental results are
supported by DFT calculations. The self-energies of the $A_g^3$ and the $E_g^3$
symmetry modes exhibit unconventional temperature evolution around 180 K. In
addition, the doubly degenerate $E_g^3$ mode shows clear change of asymmetry in
the same temperature region. The observed behavior is consistent with the
presence of the previously reported short-range magnetic order and the strong
spin-phonon coupling.
