Future Contributions to $\phi _{s}$ Measurements

The most recent results on the CP-violating phase $\phi_{s}$ measurements in the $B^0_s-\bar{B}^0_s$ system obtained by the LHCb Collaboration with Run 1 data are presented. Thanks to the precise prediction of the $\phi_{s}$ value in the frame of the Standard Model, it represents an excellent probe to search for new physics. Current results are compatible with the Standard Model predictions, and their precision will be increased with larger data sets. Further improvement is expected from the inclusion of results obtained using decay modes with smaller branching fractions.