Solid - TLS 2.0


I am running solid-server@4.3.1 in my university server. Recently i recieved an email from the systems department saying that solid domain have to have TLS 2.0 or i have to take it down. I understood that solid is using TLS 1.0. Can anyone help me where i can find the code for TLS 1.0 so that i can replace it with 2.0? Will there be any problem because of this?