Sefton Central labour MP Bill Esterson and Labour Councillors from Maghull Town Council have met with Kennet Prison bosses to hear plans for the Maghull site.
Earlier this year, the Ministry of Justice has announced it will be recategorising the prison in April next year from a category C to a category D facility.
Bill Esterson immediately contacted Kennet's governor to raise concerns about any plans to turn the jail into an open prison.
He met with the governor last week to hear detailed plans for the site.
Bill said: "When the Ministry of Justice made its announcement during the summer that it was recategorising Kennet Prison from a category C to a category D prison, I was contacted by scores of concerned local people.
"I obviously took their concerns to my meeting with Kennet Prison's governor.
"He has explained that Kennet will not be downgraded or turned into an open prison. Instead, the jail will hold inmates who are category D prisoners who are taken out on controlled work programmes.
"Security will remain the same at the site."
The MP said he will continue to monitor the prison.
Bill said: "Kennet Prison is part of our community here in East Sefton. The governor their assures me he wants the prison to be a positive part of the community.
"That's the message he gave to me and the message he game to members of Maghull Town Council who also visited the site.
"I will continue to make sure that is the case and I will continue to raise any concerns with the prison which people here raise with me.
"I'd like to thank the governor and his staff for welcoming me to the facility and showing me around."