Brendan Hines-Ike scored the goal that made the difference in the encounter when he turned the ball into his own net past helpless goalkeeper Chris Seitz in the 48th minute.
Cameroon midfielder Kaptoum delivered a solid defensive performance to ensure his side kept a clean sheet before he was replaced by Thomas McNamara.
He will hope to continue his fine showings when the Revs take on Atlanta United in their next league game on May 2.
Elsewhere, Nigerian forward Chinonso Offor was on parade for Chicago Fire in their 3-1 defeat to Atlanta United.
The attacker was handed his second league start and gave a good account of himself, although, his effort was not enough to save his side from their first loss of the season.
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