D3 v3 is going to be deleted

Hi, with KReporter v. 4.2

as soon as i try to show Google Chart Graphs i get an alert saying:

with D3 v3 is going to be deleted. Please migrate to v4 ASAP.
See go/d3v4 for details and resources on migration.

What have i to do so?

Google Charts library used in KReporter 4.2 has become old.
Since Kreporter 4.x is no longer supported (KReporter 5 next generation was moved to angular and integrated into SpiceCRM ) it guess it won’t happen.
Do you have a KReporter LIcense or do you use free version?

I’m sorry. I’m using the free version now