diff --git a/i4/src/common.lua b/i4/src/common.lua
index 34602fa..17cbb7d 100644
--- a/i4/src/common.lua
+++ b/i4/src/common.lua
@@ -678,7 +678,17 @@ local function update_inv_size(player, data)
 	data.hotbar_len = data.legacy_inventory and 8 or 9
 	data.inv_size = 4 * data.hotbar_len
 
+
 	local inv = player:get_inventory()
+	local inv_size = inv:get_size("main")
+	-- Drop items that can’t fit in new inventory size.
+	if inv_size > data.inv_size then
+		sort_inventory(player, data)
+		for i = data.inv_size + 1, inv_size, 1 do
+			minetest.item_drop(inv:get_stack("main", i), player, player:get_pos())
+		end
+	end
+
 	inv:set_size("main", data.inv_size)
 
 	player:hud_set_hotbar_itemcount(data.hotbar_len)