WalkSpeed is instantly increasing?

So what I've done is a script that checks when the player is jumping , and if he is then add more walkSpeed, but if he stops jumping and starts walking again set it back to the original WalkSpeed. Everything is working as intended just that when I reach the max WalkSpeed, stop, and jump again it instantly rises to the max instead of doing it slowly, as intended. Here is the code:

Humanoid = script.Parent.Humanoid
while true do
Humanoid.StateChanged:Connect(function(old , new)
	if new == Enum.HumanoidStateType.Running then
	Humanoid.WalkSpeed = 17	
	--Player is running^
	elseif new == Enum.HumanoidStateType.Jumping then
	Humanoid.WalkSpeed = Humanoid.WalkSpeed + 0.05
	--Player has jumped^
    end
	if Humanoid.WalkSpeed >= 50 then
		Humanoid.WalkSpeed = 50
	end
end)
wait()
end

Put this in a local function so we can use player:

local function answer(player)
      if player.Character.Humanoid.Jump == true then
         player.Character.WalkSpeed = player.Character.WalkSpeed + 1 -- Add 1 walkspeed per jump

end

end

your welcome

ps. if this does not work well i didnt test this script :P

This does not do your function, but close!