Ian Burchnall said: “Retaining Sam is a huge positive for us.
"Not only is he a tremendous goalkeeper but he’s a top professional who helps drive high standards every day.
“Everyone knows that we like to play out from the back and Sam’s distribution, composure and vast experience make him the perfect fit for us.
“He enjoys the way we play, too, and I think his decision to stay is a great reflection of the excitement players have for what we’re trying to build.
“It’s been a long, hard season for Sam and I’ve told him to rest up and get ready to play a crucial role once again for us next season.”