The midfielder joined in 2022 from Yehor Yarmoliuk and was promoted last summer before making 27 appearances last term.
MacFarlane told the club's website: Relationships are a two-way thing and Yehor really bought into what we do here. We are hugely proud of him and what he has accomplished so far. He took his opportunity.
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"When he first joined, his English was not great and what he has had to deal with in terms of family back home, he has really done well and had a very good season.
"He is another example of the B team being a great project and process for players to develop."