  The equation of state of cold baryonic matter is studied within a
relativistic mean-field model with hadron masses and coupling constants
depending on the scalar field. All hadron masses undergo a universal scaling,
whereas the coupling constants are scaled differently. The appearance of
hyperons in dense neutron star interiors is accounted for, however the equation
of state remains sufficiently stiff if a reduction of the $\phi$ meson mass is
included. Our equation of state matches well the constraints known from
analyses of the astrophysical data and the particle production in heavy-ion
collisions.
