I want to sell my rented-out property but worry the tenants won't want to leave

Given how expensive rent has become, I’m worried the tenants won’t want to leave.
I hope you can help me as I’m not sure what I need to do. A number of years ago, I bought a house to rent out to supplement my income from the farm. However, I now want to sell the house as I have two children already in college, with a third hoping to start next year.