diff --git a/mystical-upgrader.lua b/mystical-upgrader.lua
index 328dd08..cabec42 100644
--- a/mystical-upgrader.lua
+++ b/mystical-upgrader.lua
@@ -263,7 +263,7 @@ local main = function()
   refuel()
   assertEnoughFuel()
 
-  for i=1, NB_ROWS, 16 do
+  for i=1, NB_ROWS, 1 do
     upgradeProcedure()
 
     if i ~= NB_ROWS then