diff --git a/api.lua b/api.lua
index 87fec24..7206c1c 100644
--- a/api.lua
+++ b/api.lua
@@ -7,6 +7,10 @@ if minetest.deserialize(storage:get_string("arenas")) ~= nil then
   arena_lib.arenas = minetest.deserialize(storage:get_string("arenas"))
 end
 
+function arena_lib.update_storage()
+  storage:set_string("arenas", minetest.serialize(arena_lib.arenas))
+end
+
 local function newArena() end
 local function nextID() end
 local function in_game_txt(arena) end
diff --git a/signs.lua b/signs.lua
index 163a85d..7094299 100644
--- a/signs.lua
+++ b/signs.lua
@@ -110,10 +110,6 @@ function arena_lib.set_sign(sender, arena_name)
   minetest.chat_send_player(sender, "Click sinistro su un cartello per settare l'arena")
 end
 
-function arena_lib.update_storage()
-  storage:set_string("arenas", minetest.serialize(arena_lib.arenas))
-end
-
 
 
 function arena_lib.update_sign(pos, arena)