  Lateral distribution of muons in extensive air showers registered at the
Yakutsk array was investigated. The analysis covers two periods of observation:
before 2018 and after 2020, when the revision of muon detectors with 1-GeV
threshold was complete. Measured values of muon density are compared to
computational results obtained within the framework of two hadron interaction
models. Within the energy domain above $10^{18}$ eV the best agreement is
observed for proton composition primary cosmic rays.
