Internet experts are needed to help people learn computer skills at Thurrock Council's libraries.
More than 4,000 people have learnt how to use the internet, email and digital photography thanks to the service.
The Wiser4IT scheme has been running since 2002 and targets the over 50s.
All nine local libraries have been involved in the courses but due to a lack of volunteers only seven libraries are offering the free, two-hour sessions.
Councillor Oliver Gerrish, portfolio holder for education, said: “We owe a debt to our regular volunteers, but are always on the lookout for more.
“Volunteering can bring people a great sense of satisfaction, sharing skills with other people.
“It takes a special person to devote time and energy to the community in this way.
“But the benefits of learning basic computer skills are unlimited as they open a whole world of opportunities, making those that have them more competitive, with increased knowledge and access to knowledge - and improved self-worth."
If you would be able to spare at least two hours a week to help, or for more information, go to email@example.com.