diff --git a/GasGasGases2/data-util.lua b/GasGasGases2/data-util.lua
index 4b2d096..81def01 100644
--- a/GasGasGases2/data-util.lua
+++ b/GasGasGases2/data-util.lua
@@ -129,7 +129,7 @@ function util.se_matter(params)
               {"se-astronomic-science-pack-4", 1},
               {"se-energy-science-pack-4", 1},
               {"se-material-science-pack-4", 1},
-              {"matter-tech-card", 1},
+              {"kr-matter-tech-card", 1},
               {"se-deep-space-science-pack-1", 1},
             }
           },
diff --git a/GasGasGases2/prototypes/recipes.lua b/GasGasGases2/prototypes/recipes.lua
index 61ae51e..ebdd24e 100644
--- a/GasGasGases2/prototypes/recipes.lua
+++ b/GasGasGases2/prototypes/recipes.lua
@@ -94,7 +94,7 @@ data:extend({
   {
     type = "recipe",
     name = "helium",
-    category = "atmosphere-condensation",
+    category = "kr-atmosphere-condensation",
     icon = "__GasGasGases2__/graphics/icons/helium.png",
     icon_size = 64,
     energy_required = 25,
@@ -118,7 +118,7 @@ data:extend({
   {
     type = "recipe",
     name = "neon",
-    category = "atmosphere-condensation",
+    category = "kr-atmosphere-condensation",
     icon = "__GasGasGases2__/graphics/icons/neon.png",
     icon_size = 64,
     energy_required = 30,
@@ -142,7 +142,7 @@ data:extend({
   {
     type = "recipe",
     name = "argon",
-    category = "atmosphere-condensation",
+    category = "kr-atmosphere-condensation",
     icon = "__GasGasGases2__/graphics/icons/argon.png",
     icon_size = 64,
     energy_required = 40,
@@ -166,7 +166,7 @@ data:extend({
   {
     type = "recipe",
     name = "krypton",
-    category = "atmosphere-condensation",
+    category = "kr-atmosphere-condensation",
     icon = "__GasGasGases2__/graphics/icons/krypton.png",
     icon_size = 64,
     energy_required = 50,
@@ -190,7 +190,7 @@ data:extend({
   {
     type = "recipe",
     name = "xenon",
-    category = "atmosphere-condensation",
+    category = "kr-atmosphere-condensation",
     icon = "__GasGasGases2__/graphics/icons/xenon.png",
     icon_size = 64,
     energy_required = 60,
@@ -214,7 +214,7 @@ data:extend({
   {
     type = "recipe",
     name = "radon",
-    category = "atmosphere-condensation",
+    category = "kr-atmosphere-condensation",
     icon = "__GasGasGases2__/graphics/icons/radon.png",
     icon_size = 64,
     energy_required = 70,