diff --git a/changelog.txt b/changelog.txt
index 66c4e83..4f5e84f 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,4 +1,11 @@
 ---------------------------------------------------------------------------------------------------
+Version: 1.0.3
+Date: 23.3.2022
+  Features:
+    - integrated some of k2 equipment into overhul mode including personal batteries, shields and power generating equipment
+  Bugfixes:
+    - fixed ore purifaction needing logistic science as prerequisite
+---------------------------------------------------------------------------------------------------
 Version: 1.0.2
 Date: 23.3.2022
   Features:
diff --git a/control.lua b/control.lua
index 9254d2f..4b242f8 100644
--- a/control.lua
+++ b/control.lua
@@ -17,7 +17,7 @@ function print_start_message()
         game.print("If you wish to play 248k as an overhaul mod with tech and item integration, especially in Krastorio2 turn on the mod setting", {r=0.5, g=0, b=0.5})
     elseif settings.startup['overhaul_mode'].value == true then
         game.print("You are currently playing 248k on overhaul Mode.", {r=0.5, g=0, b=0.5})
-        game.print("If you wish to play 248k as an overhaul mod without tech and item integration turn off the mod setting", {r=0.5, g=0, b=0.5})
+        game.print("If you wish to play 248k as an standalone mod without tech and item integration turn off the mod setting", {r=0.5, g=0, b=0.5})
     end
 end
 
diff --git a/info.json b/info.json
index d79aa38..610461b 100644
--- a/info.json
+++ b/info.json
@@ -1,6 +1,6 @@
 {
     "name": "248k",
-    "version": "1.0.2",
+    "version": "1.0.3",
     "title": "248k Mod",
     "author": "PreLeyZero",
     "factorio_version": "1.1",
diff --git a/migrations/248k-1.0.0.lua b/migrations/248k-1.0.0.lua
index c873901..5c997c9 100644
--- a/migrations/248k-1.0.0.lua
+++ b/migrations/248k-1.0.0.lua
@@ -3,5 +3,5 @@ if settings.startup['overhaul_mode'].value == false then
     game.print("If you wish to play 248k as an overhaul mod with tech and item integration, especially in Krastorio2 turn on the mod setting", {r=0.5, g=0, b=0.5})
 elseif settings.startup['overhaul_mode'].value == true then
     game.print("You are currently playing 248k on overhaul Mode.", {r=0.5, g=0, b=0.5})
-    game.print("If you wish to play 248k as an overhaul mod without tech and item integration turn off the mod setting", {r=0.5, g=0, b=0.5})
+    game.print("If you wish to play 248k as an standalone mod without tech and item integration turn off the mod setting", {r=0.5, g=0, b=0.5})
 end
\ No newline at end of file
diff --git a/migrations/248k-1.0.3.lua b/migrations/248k-1.0.3.lua
new file mode 100644
index 0000000..7d65c32
--- /dev/null
+++ b/migrations/248k-1.0.3.lua
@@ -0,0 +1,13 @@
+if settings.startup['overhaul_mode'].value == false then
+    game.print("You are currently playing 248k on standalone Mode.", {r=0.5, g=0, b=0.5})
+    game.print("If you wish to play 248k as an overhaul mod with tech and item integration, especially in Krastorio2 turn on the mod setting", {r=0.5, g=0, b=0.5})
+elseif settings.startup['overhaul_mode'].value == true then
+    game.print("You are currently playing 248k on overhaul Mode.", {r=0.5, g=0, b=0.5})
+    game.print("If you wish to play 248k as an standalone mod without tech and item integration turn off the mod setting", {r=0.5, g=0, b=0.5})
+end
+
+for _, force in pairs(game.forces) do
+    force.reset_recipes()
+    force.reset_technologies()
+    force.reset_technology_effects()
+end
\ No newline at end of file
diff --git a/scripts/krastorio2/overhaul.lua b/scripts/krastorio2/overhaul.lua
index 4ccadd9..bceedf9 100644
--- a/scripts/krastorio2/overhaul.lua
+++ b/scripts/krastorio2/overhaul.lua
@@ -89,7 +89,7 @@ local function remove_pre_tech(tech, pre_tech)
 
     for i,v in ipairs(data.raw.technology[tech].prerequisites) do 
         if v == pre_tech then
-            v = nil
+            data.raw.technology[tech].prerequisites[i] = nil
         end
     end
 end
@@ -299,6 +299,12 @@ item_table = {
     {"energy-control-unit",     "fu_materials_energy_crystal", 1},
     {"matter-stabilizer",       "fu_materials_empty_container", 1},
 
+    --military
+    {"energy-shield-equipment", "el_energy_crystal_item", 5},
+    {"energy-shield-mk2-equipment","fi_energy_crystal_item", 5},
+    {"energy-shield-mk3-equipment","fu_materials_energy_crystal", 5},
+    {"battery-equipment",       "el_lithium_battery", 1},
+
     --science
     {"chemical-science-pack",        "el_energy_crystal_item",3},
     {"production-science-pack",      "fi_materials_titan",  1},
@@ -351,6 +357,19 @@ tech_table = {
     {"gr_compact_fusion_tech",      "kr-singularity-tech-card"},
     {"kr-intergalactic-transceiver","gr_magnet_tech"},
     {"kr-intergalactic-transceiver","gr_compact_fusion_tech"},
+    {"el_lithium_tech",             "logistic-science-pack"},
+    {"energy-shield-equipment",     "el_gower_tech"},
+    {"energy-shield-equipment",     "el_energy_tech"},
+    {"energy-shield-mk2-equipment", "fi_energy_tech"},
+    {"energy-shield-mk2-equipment", "fi_crystal_tech"},
+    {"kr-energy-shield-mk3-equipment", "fu_energy_tech"},
+    {"kr-energy-shield-mk3-equipment", "fu_crystal_tech"},
+    {"solar-panel-equipment",       "el_energy_tech"},
+    {"battery-equipment",           "el_energy_tech"},
+    {"kr-imersite-solar-panel-equipment","fu_energy_tech"},
+    {"kr-tesla-coil",               "fi_energy_tech"},
+    {"kr-portable-generator",       "fi_energy_tech"},
+    {"battery-mk2-equipment",       "fi_energy_tech"},
 
     --energy tech
     {"kr-fuel",                     "el_energy_tech"},