Collins has scored six goals in his last nine appearances for the Moes, having joined the club from Loughborough University last summer.
He said: “I want to maintain my fitness before pre-season so I’m going into that period strong.
“I want to then have a good start to the season, and I want to try and cement a place in the starting line-up.”
Williams joined the club in September 2020 after impressing manager Lee Attenborough during a trial in pre-season when he scored in a friendly against Coleshill.
He made seven appearances for the Moes during last year's curtailed season.
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