An upgrade of the magnetic field profile of the Texas A&M 14.5 GHz electron cyclotron resonance ion source (ECRIS) is in progress, guided by well-established magnetic-field scaling rules for ECRIS. On the injection end, a new lower-carbon steel plug with a modified design has already been installed to increase the axial magnetic field at the injection end of the plasma chamber. Now, detailed calculations, using the permanent-magnet code PANDIRA, have been performed to optimize the radial magnetic field of the hexapole. A new aluminum plasma chamber will soon be constructed with more reliable cooling. Finally, six new NdFeB permanent-magnet bars will be installed in the new chamber before the final replacement of the old plasma-chamber-hexapole assembly. Together, these modifications are expected to significantly improve the performance of the ion source by achieving better plasma confinement and by enhancing beam stability, eventually leading to an increase in high-charge-state ion production.