Software Tester / Test Engineer - Need advice on certification path?

Hi techexams forum,

I have a bachelor's degree in CS and started working as a Software Tester in April.
I've took & passed the ISTQB Foundation Level Exam last month & now I'm looking for which cert to take next?

I'm really interested in certs such as sec+, ceh or oscp but I'm unsure how they would add to the knowledge a software tester needs? (maybe Security Testing?)

Thanks a lot!