The Monash 2013 Tune for PYTHIA 8.1 is an updated set of parameters that improves the description of hadronization and final-state radiation in both electron-positron and hadron collisions. The parameters are constrained by data from LEP, SLD, and the LHC, with a focus on heavy-quark fragmentation and strangeness production. The updated parameters combine the latest fragmentation parameters with the NNPDF2.3 LO PDF set, and are available in PYTHIA 8.185 by setting Tune:ee = 7 and Tune:pp = 14. The parameters are manually adjusted to improve agreement with experimental data, with a focus on the energy scaling between different collider energies. The resulting parameters show significant improvements in several distributions, though some discrepancies remain, particularly for strange particles and baryons. The parameters are also adjusted to better describe the fragmentation of heavy quarks, with a focus on the b quark. The parameters are tested against data from LEP and SLD, and are found to produce a more accurate description of the fragmentation of heavy quarks. The parameters are also used in hadron collisions, with a new PDF set from the NNPDF collaboration. The parameters are chosen to ensure consistency with the strong coupling value used in the PDF set, and are adjusted to improve agreement with experimental data. The resulting parameters are found to produce a more accurate description of the fragmentation of heavy quarks, with a focus on the b quark. The parameters are also used in hadron collisions, with a new PDF set from the NNPDF collaboration. The parameters are chosen to ensure consistency with the strong coupling value used in the PDF set, and are adjusted to improve agreement with experimental data. The resulting parameters are found to produce a more accurate description of the fragmentation of heavy quarks, with a focus on the b quark.The Monash 2013 Tune for PYTHIA 8.1 is an updated set of parameters that improves the description of hadronization and final-state radiation in both electron-positron and hadron collisions. The parameters are constrained by data from LEP, SLD, and the LHC, with a focus on heavy-quark fragmentation and strangeness production. The updated parameters combine the latest fragmentation parameters with the NNPDF2.3 LO PDF set, and are available in PYTHIA 8.185 by setting Tune:ee = 7 and Tune:pp = 14. The parameters are manually adjusted to improve agreement with experimental data, with a focus on the energy scaling between different collider energies. The resulting parameters show significant improvements in several distributions, though some discrepancies remain, particularly for strange particles and baryons. The parameters are also adjusted to better describe the fragmentation of heavy quarks, with a focus on the b quark. The parameters are tested against data from LEP and SLD, and are found to produce a more accurate description of the fragmentation of heavy quarks. The parameters are also used in hadron collisions, with a new PDF set from the NNPDF collaboration. The parameters are chosen to ensure consistency with the strong coupling value used in the PDF set, and are adjusted to improve agreement with experimental data. The resulting parameters are found to produce a more accurate description of the fragmentation of heavy quarks, with a focus on the b quark. The parameters are also used in hadron collisions, with a new PDF set from the NNPDF collaboration. The parameters are chosen to ensure consistency with the strong coupling value used in the PDF set, and are adjusted to improve agreement with experimental data. The resulting parameters are found to produce a more accurate description of the fragmentation of heavy quarks, with a focus on the b quark.