diff --git a/tunnels-miner.lua b/tunnels-miner.lua
index d22c62b..53e51f3 100644
--- a/tunnels-miner.lua
+++ b/tunnels-miner.lua
@@ -6,7 +6,7 @@ local TIME_TO_START = 3
 local IDLE_TIME_BETWEEN_TUNNELS = 1
 local SPACE_BETWEEN_TUNNELS = 3
 
-local VERSION = "2.1.1"
+local VERSION = "2.2.0"
 
 local MOVES_BY_DIRECTION = {
   right = {
@@ -129,13 +129,20 @@ local function ensureEnoughSpaceInInventory(config)
     return
   end
 
-  -- 1. select an item that is not in whitelist item
+  -- 1. try to compact inventory
+  turtleUtils.compactInventory()
+
+  if not turtleUtils.isInventoryFull() then
+    return
+  end
+
+  -- 2. otherwise select an item that is not in whitelist item
   local selected = turtleUtils.selectItemBy(function(slot)
     return not isWhitelistedOre(config, turtle.getItemDetail(slot))
   end)
 
   if selected then
-    -- 2. drop the selected item
+    -- 3. and drop the selected item
     turtle.drop()
     trySelectEmptySlot()
   else