diff --git a/README.md b/README.md
index 122335c..880d68d 100644
--- a/README.md
+++ b/README.md
@@ -15,3 +15,4 @@ Changelog:
  - 0.2 - Added error checking and a 10 second warning before becoming visible
  - 0.3 - Potions can now be stacked
  - 0.4 - Potion recipe changed now that Nyan Cat no longer in default game
+ - 0.5 - Use newer functions, Minetest 0.4.16 and anove needed to run
diff --git a/init.lua b/init.lua
index f59dbf9..125cd64 100644
--- a/init.lua
+++ b/init.lua
@@ -3,8 +3,8 @@ invisibility = {}
 
 local effect_time = 180 -- 3 minutes
 
--- reset player invisibility if they go offline
 
+-- reset player invisibility if they go offline
 minetest.register_on_leaveplayer(function(player)
 
 	local name = player:get_player_name()
@@ -14,8 +14,15 @@ minetest.register_on_leaveplayer(function(player)
 	end
 end)
 
--- invisibility potion
 
+-- creative check
+local creative_mode_cache = minetest.settings:get_bool("creative_mode")
+function is_creative(name)
+	return creative_mode_cache or minetest.check_player_privs(name, {creative = true})
+end
+
+
+-- invisibility potion
 minetest.register_node("invisibility:potion", {
 	description = "Invisibility Potion",
 	drawtype = "plantlike",
@@ -87,7 +94,7 @@ minetest.register_node("invisibility:potion", {
 		end)
 
 		-- take potion, return empty bottle (and rest of potion stack)
-		if not minetest.setting_getbool("creative_mode") then
+		if not is_creative(user:get_player_name()) then
 
 			local item_count = user:get_wielded_item():get_count()
 			local inv = user:get_inventory()
@@ -114,8 +121,8 @@ minetest.register_node("invisibility:potion", {
 	end,
 })
 
--- craft recipe
 
+-- craft recipe
 minetest.register_craft( {
 	output = "invisibility:potion",
 	type = "shapeless",
@@ -129,8 +136,8 @@ minetest.register_craft( {
 	},
 })
 
--- invisibility function
 
+-- invisibility function
 invisible = function(player, toggle)
 
 	if not player then return false end
@@ -168,8 +175,8 @@ invisible = function(player, toggle)
 
 end
 
--- vanish command (admin only)
 
+-- vanish command (admin only)
 minetest.register_chatcommand("vanish", {
 	params = "<name>",
 	description = "Make player invisible",