How to make local scripts change BoolValue?

I'm wondering how can I make a local script change the BoolValue and have the server read it. Currently I have this Crouching script that works playing the animation to everyone else, however the value stay the same (false). How do I fix this?

Player = game.Players.LocalPlayer
repeat
	wait()
until Player.Character
Mouser = Player:GetMouse()
name = Player.Name
char = game.Workspace[Player.Name]
Animation = script.Anim

animtrack = char.Humanoid:LoadAnimation(Animation)


Mouser.KeyDown:connect(function(key)
	if string.byte(key) == 48 then
		animtrack:Play()
		Player:FindFirstChild("Crouch").Value = true
		char.Humanoid.WalkSpeed = 8
			end
		end)
	
	Mouser.KeyUp:connect(function(key)
		
	 if string.byte(key) == 48  then
		script.Disabled = true
		animtrack:Stop()
		Player:FindFirstChild("Crouch").Value = false
		char.Humanoid.WalkSpeed = 16
		script.Disabled = false	
	end
end)

You can't change the server directly using a local script. You can only change it by using remote events and remote functions due to filtering enabled.

Hoped this helped!