Extending lease contract with tenant without realtor involved

[Wakes Andre]

I have a rental property in West Palm Beach, FL area. The lease contract ends in a couple of months and the tenant would like to stay for another year. The tenant has been living there for 4 years already and I have a copy of the lease agreement signed by the previous owner. At this point, I have no real estate agent involved. 

Can I just prepare a new copy of the existing contract and ask the tenant to sign it in person or using services like DocuSign? What would you guys recommend to make it right?