ISRO just pulled off a successful ground test of its upgraded PSLV third stage at Sriharikota, bouncing back after two recent mission failures.
The latest tweaks are all about making the rocket more reliable and keeping India's space ambitions on track.
ISRO upgrades PSLV nozzle and seals
The upgrades include changes to the nozzle design and extra layers in the sealing systems (basically, more backup for safer launches).
After those earlier setbacks, Isro also tightened up quality checks and raw material standards.
They're planning further tests to keep improving PSLV's performance for future space missions and satellite launches.