diff --git a/lignumis/control.lua b/lignumis/control.lua
index a89b78c..115ffee 100644
--- a/lignumis/control.lua
+++ b/lignumis/control.lua
@@ -62,7 +62,7 @@ script.on_event(e.on_player_created, function(event)
         local debris_items = { ["lumber"] = 8 }
 
         surface.daytime = 0.7
-        crash_site.create_crash_site(surface, { -5, -6 }, ship_items, debris_items, util.copy(storage.crashed_ship_parts))
+        crash_site.create_crash_site(surface, { -5, -6 }, ship_items, debris_items, table.deepcopy(storage.crashed_ship_parts))
         util.remove_safe(player, storage.crashed_ship_items)
         util.remove_safe(player, storage.crashed_debris_items)
         player.get_main_inventory().sort_and_merge()
diff --git a/lignumis/prototypes/content/basic-construction-robots.lua b/lignumis/prototypes/content/basic-construction-robots.lua
index d80aba4..ad3d536 100644
--- a/lignumis/prototypes/content/basic-construction-robots.lua
+++ b/lignumis/prototypes/content/basic-construction-robots.lua
@@ -2,7 +2,7 @@ local item_sounds = require("__base__.prototypes.item_sounds")
 local item_tints = require("__base__.prototypes.item-tints")
 
 local function robot(color)
-    local result = util.copy(data.raw["construction-robot"]["construction-robot"])
+    local result = table.deepcopy(data.raw["construction-robot"]["construction-robot"])
     result.name = "basic-construction-robot-" .. color
     result.icon = "__lignumis__/graphics/icons/basic-construction-robot-" .. color .. ".png"
     result.minable.result = "basic-construction-robot-" .. color
@@ -115,7 +115,7 @@ local function generator_recipe(color, ingredients)
 end
 
 local function roboport(color)
-    local result = util.copy(data.raw["roboport-equipment"]["personal-roboport-equipment"])
+    local result = table.deepcopy(data.raw["roboport-equipment"]["personal-roboport-equipment"])
     result.name = "basic-personal-roboport-equipment-" .. color
     result.take_result = "basic-personal-roboport-equipment-" .. color
     result.sprite.filename = "__lignumis__/graphics/equipment/basic-personal-roboport-equipment-" .. color .. ".png"
diff --git a/lignumis/prototypes/content/burner-agricultural-tower.lua b/lignumis/prototypes/content/burner-agricultural-tower.lua
index e44abaf..c29c7d6 100644
--- a/lignumis/prototypes/content/burner-agricultural-tower.lua
+++ b/lignumis/prototypes/content/burner-agricultural-tower.lua
@@ -1,6 +1,6 @@
 local item_sounds = require("__base__.prototypes.item_sounds")
 
-local agricultural_tower = util.copy(data.raw["agricultural-tower"]["agricultural-tower"])
+local agricultural_tower = table.deepcopy(data.raw["agricultural-tower"]["agricultural-tower"])
 agricultural_tower.name = "burner-agricultural-tower"
 agricultural_tower.minable.result = "burner-agricultural-tower"
 agricultural_tower.next_upgrade = "agricultural-tower"
@@ -43,7 +43,7 @@ crane.speed = {
     }
 }
 
-local remnants = util.copy(data.raw["corpse"]["agricultural-tower-remnants"])
+local remnants = table.deepcopy(data.raw["corpse"]["agricultural-tower-remnants"])
 remnants.name = "burner-agricultural-tower-remnants"
 remnants.icon = "__lignumis__/graphics/icons/burner-agricultural-tower.png"
 remnants.animation.filename = "__lignumis__/graphics/entity/burner-agricultural-tower-remnants.png"
diff --git a/lignumis/prototypes/content/burner-assembling-machine.lua b/lignumis/prototypes/content/burner-assembling-machine.lua
index c8f7e3c..6efc01a 100644
--- a/lignumis/prototypes/content/burner-assembling-machine.lua
+++ b/lignumis/prototypes/content/burner-assembling-machine.lua
@@ -1,6 +1,6 @@
 local item_sounds = require("__base__.prototypes.item_sounds")
 
-local assembling_machine = util.copy(data.raw["assembling-machine"]["assembling-machine-1"])
+local assembling_machine = table.deepcopy(data.raw["assembling-machine"]["assembling-machine-1"])
 assembling_machine.name = "burner-assembling-machine"
 assembling_machine.icon = "__lignumis__/graphics/icons/burner-assembling-machine.png"
 assembling_machine.minable.result = "burner-assembling-machine"
@@ -36,7 +36,7 @@ assembling_machine.energy_source = {
 }
 assembling_machine.energy_usage = "75kW"
 
-local remnants = util.copy(data.raw["corpse"]["assembling-machine-1-remnants"])
+local remnants = table.deepcopy(data.raw["corpse"]["assembling-machine-1-remnants"])
 remnants.name = "burner-assembling-machine-remnants"
 remnants.icon = "__lignumis__/graphics/icons/burner-assembling-machine.png"
 remnants.animation[1].filename = "__lignumis__/graphics/entity/burner-assembling-machine-remnants.png"
diff --git a/lignumis/prototypes/content/burner-long-handed-inserter.lua b/lignumis/prototypes/content/burner-long-handed-inserter.lua
index c793531..c777c18 100644
--- a/lignumis/prototypes/content/burner-long-handed-inserter.lua
+++ b/lignumis/prototypes/content/burner-long-handed-inserter.lua
@@ -1,6 +1,6 @@
 local item_sounds = require("__base__.prototypes.item_sounds")
 
-local long_handed_inserter = util.copy(data.raw["inserter"]["long-handed-inserter"])
+local long_handed_inserter = table.deepcopy(data.raw["inserter"]["long-handed-inserter"])
 long_handed_inserter.name = "burner-long-handed-inserter"
 long_handed_inserter.icon = "__lignumis__/graphics/icons/burner-long-handed-inserter.png"
 long_handed_inserter.minable.result = "burner-long-handed-inserter"
@@ -32,7 +32,7 @@ long_handed_inserter.energy_source = {
 long_handed_inserter.extension_speed = 0.035
 long_handed_inserter.rotation_speed = 0.014
 
-local remnants = util.copy(data.raw["corpse"]["long-handed-inserter-remnants"])
+local remnants = table.deepcopy(data.raw["corpse"]["long-handed-inserter-remnants"])
 remnants.name = "burner-long-handed-inserter-remnants"
 remnants.icon = "__lignumis__/graphics/icons/burner-long-handed-inserter.png"
 remnants.animation[1].filename = "__lignumis__/graphics/entity/burner-long-handed-inserter-remnants.png"
diff --git a/lignumis/prototypes/content/desiccation-furnace.lua b/lignumis/prototypes/content/desiccation-furnace.lua
index 37a5e21..2686234 100644
--- a/lignumis/prototypes/content/desiccation-furnace.lua
+++ b/lignumis/prototypes/content/desiccation-furnace.lua
@@ -1,6 +1,6 @@
 local item_sounds = require("__base__.prototypes.item_sounds")
 
-local furnace = util.copy(data.raw.furnace["stone-furnace"])
+local furnace = table.deepcopy(data.raw.furnace["stone-furnace"])
 furnace.name = "desiccation-furnace"
 furnace.fluid_boxes = {
     {
diff --git a/lignumis/prototypes/content/gold/pipes.lua b/lignumis/prototypes/content/gold/pipes.lua
index 830b7bc..05521b0 100644
--- a/lignumis/prototypes/content/gold/pipes.lua
+++ b/lignumis/prototypes/content/gold/pipes.lua
@@ -36,7 +36,7 @@ function make_rotated_animation_variations_from_sheet(variation_count, sheet) --
     return result
 end
 
-local pipe = util.copy(data.raw.pipe["pipe"])
+local pipe = table.deepcopy(data.raw.pipe["pipe"])
 pipe.name = "gold-pipe"
 pipe.icon = "__lignumis__/graphics/icons/gold-pipe.png"
 pipe.corpse = "gold-pipe-remnants"
@@ -120,7 +120,7 @@ local pipe_remnants = {
     })
 }
 
-local pipe_to_ground = util.copy(data.raw["pipe-to-ground"]["pipe-to-ground"])
+local pipe_to_ground = table.deepcopy(data.raw["pipe-to-ground"]["pipe-to-ground"])
 pipe_to_ground.name = "gold-pipe-to-ground"
 pipe_to_ground.icon = "__lignumis__/graphics/icons/gold-pipe-to-ground.png"
 pipe_to_ground.corpse = "gold-pipe-to-ground-remnants"
diff --git a/lignumis/prototypes/content/gold/stromatolite.lua b/lignumis/prototypes/content/gold/stromatolite.lua
index 296217f..3d50035 100644
--- a/lignumis/prototypes/content/gold/stromatolite.lua
+++ b/lignumis/prototypes/content/gold/stromatolite.lua
@@ -1,6 +1,6 @@
 local space_age_item_sounds = require("__space-age__.prototypes.item_sounds")
 
-local stromatolite = util.copy(data.raw["simple-entity"]["copper-stromatolite"])
+local stromatolite = table.deepcopy(data.raw["simple-entity"]["copper-stromatolite"])
 stromatolite.name = "gold-stromatolite"
 stromatolite.icon = "__lignumis__/graphics/icons/gold-stromatolite.png"
 stromatolite.autoplace = {
@@ -8,7 +8,7 @@ stromatolite.autoplace = {
     "basis_noise{x = x, y = y, seed0 = map_seed, seed1 = 2000000, input_scale = 1/8, output_scale = 1/3}",
     tile_restriction = { "natural-gold-soil" }
 }
-stromatolite.collision_mask = util.copy(data.raw["plant"]["tree-plant"].collision_mask)
+stromatolite.collision_mask = table.deepcopy(data.raw["plant"]["tree-plant"].collision_mask)
 stromatolite.mining_time = 2
 stromatolite.minable.results = {
     { type = "item", name = "gold-ore",               amount_min = 1, amount_max = 7 },
@@ -132,7 +132,7 @@ stromatolite.pictures = {
     }
 }
 
-local plant = util.copy(data.raw["plant"]["tree-plant"])
+local plant = table.deepcopy(data.raw["plant"]["tree-plant"])
 plant.name = "gold-stromatolite-plant"
 plant.localised_name = { "entity-name.gold-stromatolite-plant" }
 plant.icon = "__lignumis__/graphics/icons/gold-stromatolite.png"
@@ -156,7 +156,7 @@ plant.variation_weights = nil
 plant.collision_box = { { -0.5, -0.5 }, { 0.5, 0.5 } }
 plant.selection_box = { { -0.7, -0.7 }, { 0.7, 0.7 } }
 plant.remains_when_mined = nil
-plant.pictures = util.copy(stromatolite.pictures)
+plant.pictures = table.deepcopy(stromatolite.pictures)
 plant.autoplace = {
     probability_expression = "0",
     tile_restriction = { "natural-gold-soil" }
diff --git a/lignumis/prototypes/content/steam-assembling-machine.lua b/lignumis/prototypes/content/steam-assembling-machine.lua
index 5228df0..a03940a 100644
--- a/lignumis/prototypes/content/steam-assembling-machine.lua
+++ b/lignumis/prototypes/content/steam-assembling-machine.lua
@@ -1,6 +1,6 @@
 local item_sounds = require("__base__.prototypes.item_sounds")
 
-local assembling_machine = util.copy(data.raw["assembling-machine"]["assembling-machine-2"])
+local assembling_machine = table.deepcopy(data.raw["assembling-machine"]["assembling-machine-2"])
 assembling_machine.name = "steam-assembling-machine"
 assembling_machine.icon = "__lignumis__/graphics/icons/steam-assembling-machine.png"
 assembling_machine.minable.result = "steam-assembling-machine"
@@ -8,7 +8,7 @@ assembling_machine.next_upgrade = "assembling-machine-1"
 assembling_machine.module_slots = nil
 assembling_machine.corpses = "steam-assembling-machine-remnants"
 assembling_machine.resistances = nil
-assembling_machine.graphics_set = util.copy(data.raw["assembling-machine"]["assembling-machine-1"].graphics_set)
+assembling_machine.graphics_set = table.deepcopy(data.raw["assembling-machine"]["assembling-machine-1"].graphics_set)
 assembling_machine.graphics_set.animation.layers[1].filename =
 "__lignumis__/graphics/entity/steam-assembling-machine.png"
 assembling_machine.crafting_categories = {
@@ -40,7 +40,7 @@ assembling_machine.energy_source = {
     }
 }
 
-local remnants = util.copy(data.raw["corpse"]["assembling-machine-1-remnants"])
+local remnants = table.deepcopy(data.raw["corpse"]["assembling-machine-1-remnants"])
 remnants.name = "steam-assembling-machine-remnants"
 remnants.icon = "__lignumis__/graphics/icons/steam-assembling-machine.png"
 remnants.animation[1].filename = "__lignumis__/graphics/entity/steam-assembling-machine-remnants.png"
diff --git a/lignumis/prototypes/content/wood-lab.lua b/lignumis/prototypes/content/wood-lab.lua
index 5dabba6..7f360be 100644
--- a/lignumis/prototypes/content/wood-lab.lua
+++ b/lignumis/prototypes/content/wood-lab.lua
@@ -13,7 +13,7 @@ data:extend({
         dying_explosion = "lab-explosion",
         collision_box = { { -1.2, -1.2 }, { 1.2, 1.2 } },
         selection_box = { { -1.5, -1.5 }, { 1.5, 1.5 } },
-        damaged_trigger_effect = util.copy(data.raw.lab["lab"].damaged_trigger_effect),
+        damaged_trigger_effect = table.deepcopy(data.raw.lab["lab"].damaged_trigger_effect),
         on_animation = {
             layers = {
                 {
diff --git a/lignumis/prototypes/content/wooden-rocket-silo.lua b/lignumis/prototypes/content/wooden-rocket-silo.lua
index 206c117..0897e4e 100644
--- a/lignumis/prototypes/content/wooden-rocket-silo.lua
+++ b/lignumis/prototypes/content/wooden-rocket-silo.lua
@@ -1,6 +1,6 @@
 local item_sounds = require("__base__.prototypes.item_sounds")
 
-local silo = util.copy(data.raw["rocket-silo"]["rocket-silo"])
+local silo = table.deepcopy(data.raw["rocket-silo"]["rocket-silo"])
 silo.name = "provisional-rocket-silo"
 silo.module_slots = 0
 silo.allowed_effects = { "consumption", "pollution" }
@@ -45,13 +45,13 @@ silo.launch_to_space_platforms = false
 silo.rocket_parts_storage_cap = 50
 silo.to_be_inserted_to_rocket_inventory_size = 1
 
-local silo_item = util.copy(data.raw["item"]["rocket-silo"])
+local silo_item = table.deepcopy(data.raw["item"]["rocket-silo"])
 silo_item.name = "provisional-rocket-silo"
 silo_item.order = "0[provisional-rocket-silo]"
 silo_item.place_result = "provisional-rocket-silo"
 silo_item.icon = "__lignumis__/graphics/icons/provisional-rocket-silo.png"
 
-local silo_recipe = util.copy(data.raw["recipe"]["rocket-silo"])
+local silo_recipe = table.deepcopy(data.raw["recipe"]["rocket-silo"])
 silo_recipe.name = "provisional-rocket-silo"
 silo_recipe.results[1].name = "provisional-rocket-silo"
 silo_recipe.ingredients = {
@@ -62,7 +62,7 @@ silo_recipe.ingredients = {
     { type = "item", name = "gold-cable",        amount = 100 }
 }
 
-local rocket = util.copy(data.raw["rocket-silo-rocket"]["rocket-silo-rocket"])
+local rocket = table.deepcopy(data.raw["rocket-silo-rocket"]["rocket-silo-rocket"])
 rocket.name = "provisional-rocket"
 rocket.rising_speed = 1 / (14 * 60)
 rocket.engine_starting_speed = 1 / (11 * 60)
diff --git a/lignumis/script/to-nauvis.lua b/lignumis/script/to-nauvis.lua
index e39f9db..a3a9ae2 100644
--- a/lignumis/script/to-nauvis.lua
+++ b/lignumis/script/to-nauvis.lua
@@ -28,7 +28,7 @@ local function travel_to_nauvis()
     local crashed_ship_parts = remote.call("freeplay", "get_ship_parts")
 
     nauvis.daytime = 0.7
-    crash_site.create_crash_site(nauvis, { -5, -6 }, ship_items, debris_items, util.copy(crashed_ship_parts))
+    crash_site.create_crash_site(nauvis, { -5, -6 }, ship_items, debris_items, table.deepcopy(crashed_ship_parts))
 end
 
 script.on_event(e.on_rocket_launched, function(event)