PDF Generator rendering engine version

[Former Community Member]

I'm using ES3 version 10.0.2, GM. Using the service "HTML To PDF" I saw that the rendering engine is:

mozilla/5.0 (windows nt 6.1; win64; x64) applewebkit/534.34 (khtml, like gecko) qt/4.8.5 safari/534.34

My question: Is there any way to upgrade the service to use newer version of this engine, and if not is ES4 services use newer engine?

Thanks