[Gamerule keepInventory false is not working.]

1 minute ago, Bear said:

Try restarting your server, and make sure the command is /gamerule keepInventory false

I've restarted it multiple times and every time I've used that exact command.

[Gamerule keepInventory false is not working.]

I am trying to set keepInventory to false so players will drop items when they die but no matter how many times I type the command players still keep their items upon death. I have tried typing it in game, in the console, and in a command block. But, nothing has worked yet.