Arbiter with reduce journal size


I have 2-way replica set created for my application. I have 20 replica sets.
I need to create 20 arbiters running on a third node to support 2-way replica-set.
Every arbiter is taking default 300MB (mainly for journal) and i need 6+ GB to just run the arbiter.

Can you please help, how i can reduce the journal size to a small value in 4.4 version of mongodb

the options like --smallfile/–nojoural in pre 3.4 is not available in 4.4 and above.
Is there any other option available for this ?