diff --git a/changelog.txt b/changelog.txt
index c53fff2..9d1c387 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,4 +1,11 @@
 ---------------------------------------------------------------------------------------------------
+Version: 1.3.1
+Date: 17.03.2021
+  Features:
+    - Add deadlock tier by draddy82 - https://github.com/draddy82
+    - Add next_upgrade to entities
+    - Add related_underground_belt to normal belts - Thanks JanSharp - https://github.com/JanSharp
+---------------------------------------------------------------------------------------------------
 Version: 1.3.0
 Date: 06.12.2020
   Features:
diff --git a/data-updates.lua b/data-updates.lua
new file mode 100644
index 0000000..b70b7bb
--- /dev/null
+++ b/data-updates.lua
@@ -0,0 +1,25 @@
+if deadlock then
+	deadlock.add_tier({
+		transport_belt      = "BetterBelts_ultra-transport-belt",
+		colour              = {r=0,g=211,b=37},
+		technology          = "logistics-3",
+		order				= "d",
+		loader				= "BetterBelts_ultra-deadlock-loader", 		
+		loader_ingredients  = {
+			{"express-transport-belt-loader",1},
+			{"iron-gear-wheel",40},
+		},
+		beltbox				= "BetterBelts_ultra-deadlock-beltbox",
+		beltbox_ingredients = {
+			{"express-transport-belt-beltbox",1},
+			{"steel-plate",40},
+			{"iron-gear-wheel",40},
+			{"processing-unit",5},
+		},
+		beltbox_technology  = "deadlock-stacking-3",
+	})
+	  
+	if data.raw.furnace["BetterBelts_ultra-transport-belt-beltbox"] then
+		data.raw.furnace["express-transport-belt-beltbox"].next_upgrade = "BetterBelts_ultra-transport-belt-beltbox"
+	end
+end
diff --git a/data.lua b/data.lua
index 11f179c..a0587f5 100644
--- a/data.lua
+++ b/data.lua
@@ -60,12 +60,13 @@ function BetterBelts_addRecipe(baseName,thisName,thisIngredients)
 	data.raw[obj.type][obj.name] = obj
 end
 
-function BetterBelts_addEntity_Belt(beltName,beltSpeed)
+function BetterBelts_addEntity_Belt(beltName,beltSpeed, relatedUndergroundBelt)
 	local obj = util.table.deepcopy(data.raw["transport-belt"]["express-transport-belt"])
 	obj.name = BB.modName .. "_" .. beltName
 	obj.minable.result = obj.name
 	
 	obj.speed = beltSpeed
+	obj.related_underground_belt = BB.modName .. "_" .. relatedUndergroundBelt
 	
 	obj.icon = BB.baseGraphicsIcons .. beltName .. ".png"
 	obj.icon_size = 32
@@ -75,6 +76,7 @@ function BetterBelts_addEntity_Belt(beltName,beltSpeed)
 	obj.belt_animation_set.animation_set.hr_version.filename = BB.baseGraphicsEntity .. "hr-" .. beltName .. ".png"
 	
 	data.raw[obj.type][obj.name] = obj
+	data.raw["transport-belt"]["express-transport-belt"].next_upgrade = obj.name
 end
 
 function BetterBelts_addEntity_undergroundBelt(beltName,beltSpeed,beltMax_distance,mainName)
@@ -138,6 +140,7 @@ function BetterBelts_addEntity_Loader(beltName,beltSpeed,beltMax_distance)
 	obj.belt_animation_set = ultra_belt_animation_set
 	
 	data.raw[obj.type][obj.name] = obj
+	data.raw["loader"]["express-loader"].next_upgrade = obj.name
 end
 
 function BetterBelts_addEntity_Splitter(beltName,beltSpeed,beltMax_distance)
@@ -182,6 +185,7 @@ function BetterBelts_addEntity_Splitter(beltName,beltSpeed,beltMax_distance)
 	obj.belt_animation_set = ultra_belt_animation_set
 	
 	data.raw[obj.type][obj.name] = obj
+	data.raw["splitter"]["express-splitter"].next_upgrade = obj.name
 end
 
 function BetterBelts_addTechnology(thisName,thisIcon,thisType,thisEffect,thisPrerequisites,thisCount,thisIngredients,thisTime,thisOrder,className,modName)
@@ -223,7 +227,7 @@ function BetterBelts_BeltClass(className,classSpeed)
 
 	BetterBelts_addItem("fast-transport-belt",className .. "-transport-belt","a[transport-belt]-d[" .. className .. "-transport-belt]")
 	BetterBelts_addRecipe("fast-transport-belt",className .. "-transport-belt",{{"iron-gear-wheel", 5},{"express-transport-belt", 2}})
-	BetterBelts_addEntity_Belt(className .. "-transport-belt",classSpeed)
+	BetterBelts_addEntity_Belt(className .. "-transport-belt",classSpeed, className .. "-underground-belt-v1")
 
 
 	BetterBelts_addItem("fast-underground-belt",className .. "-underground-belt-v1","b[underground-belt]-d[" .. className .. "-underground-belt-v1]")
@@ -248,7 +252,13 @@ function BetterBelts_BeltClass(className,classSpeed)
 	BetterBelts_addTechnology(className .. "-class",className .. "-transport-belt","unlock-recipe",classRecipes,{"logistics-3"},150,4,30,"a",className,BB.modName)
 end
 
-
+--activate again default loaders
+data.raw["loader"]["loader"].flags = {"placeable-neutral", "player-creation"}
+data.raw["loader"]["fast-loader"].flags = {"placeable-neutral", "player-creation"}
+data.raw["loader"]["express-loader"].flags = {"placeable-neutral", "player-creation"}
+data.raw["item"]["loader"].flags = null
+data.raw["item"]["fast-loader"].flags = null
+data.raw["item"]["express-loader"].flags = null
 
 BetterBelts_BeltClass("ultra",0.2)
 
diff --git a/info.json b/info.json
index 286d1b7..af2b2ed 100644
--- a/info.json
+++ b/info.json
@@ -1,6 +1,6 @@
 {
   "name": "BetterBelts",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "title": "Better Belts",
   "author": "DerMistkaefer, adcrafter27, LaVADraGoN, Updated by: XiNaru",
   "contact": "dermistkaefer@gmail.com",
diff --git a/locale/en/BetterBelts.cfg b/locale/en/BetterBelts.cfg
index 4552d1d..ae67f44 100644
--- a/locale/en/BetterBelts.cfg
+++ b/locale/en/BetterBelts.cfg
@@ -5,6 +5,8 @@ BetterBelts_ultra-underground-belt-v2=High Speed Underground Belt v2
 BetterBelts_ultra-underground-belt-v3=High Speed Underground Belt v3
 BetterBelts_ultra-splitter=High Speed Splitter Belt
 BetterBelts_ultra-loader=High Speed Loader
+BetterBelts_ultra-deadlock-loader=High Speed stacking beltbox
+BetterBelts_ultra-deadlock-beltbox=High Speed compact loader
 
 [technology-name]
 BetterBelts_ultra-class=High Speed Belt Class
diff --git a/migrations/BetterBelts_1.3.1.json b/migrations/BetterBelts_1.3.1.json
new file mode 100644
index 0000000..09b65a6
--- /dev/null
+++ b/migrations/BetterBelts_1.3.1.json
@@ -0,0 +1,17 @@
+{
+    "item":
+    [
+        ["Ultra-CompactLoader", "BetterBelts_ultra-deadlock-loader"],
+        ["Ultra-Beltbox", "BetterBelts_ultra-deadlock-beltbox"]
+    ],
+    "recipe":
+    [
+        ["Ultra-CompactLoader", "BetterBelts_ultra-deadlock-loader"],
+        ["Ultra-Beltbox", "BetterBelts_ultra-deadlock-beltbox"]
+    ],
+    "entity":
+    [
+        ["Ultra-CompactLoader", "BetterBelts_ultra-deadlock-loader"],
+        ["Ultra-Beltbox", "BetterBelts_ultra-deadlock-beltbox"]
+    ]
+  }
\ No newline at end of file