How to use a custom version of Minecraft on your FreeMC Server
Tutorial written by Nick Evans
A FreeMC.Host Minecraft Server. Create one here for free
The .jar file of the custom version that you want to use
Step 1: Open the website
Step 2: Click Advanced Settings on the server
Step 3: Select "Custom server.jar"
Step 4: Open the panel
Step 5: Click on the server
Step 6: Open File Management on the left
Step 7: Drag the .jar file to the middle
Step 8: Rename the .jar file to "server.jar"
Step 9: Restart your server