diff --git a/carbon-recipe-updates.lua b/carbon-recipe-updates.lua
index 46fd035..9afad54 100644
--- a/carbon-recipe-updates.lua
+++ b/carbon-recipe-updates.lua
@@ -5,7 +5,6 @@ util.add_prerequisite("steel-processing", "graphite-processing")
 
 util.add_prerequisite("low-density-structure", "diamond-processing")
 util.add_prerequisite("advanced-electronics-2", "diamond-processing")
-util.add_prerequisite("production-science-pack", "diamond-processing")
 util.add_prerequisite("laser", "diamond-processing")
 
 util.add_prerequisite("power-armor-mk2", "graphene")
diff --git a/carbon-recipe.lua b/carbon-recipe.lua
index 51f91e5..a1922d5 100644
--- a/carbon-recipe.lua
+++ b/carbon-recipe.lua
@@ -272,7 +272,7 @@ data:extend({
           },
       time = 15,
     },
-    prerequisites = {"chemical-science-pack"},
+    prerequisites = {"advanced-material-processing-2"},
     order = "b-b"
   },
 })
diff --git a/changelog.txt b/changelog.txt
index 2d548ac..7b87bd8 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,4 +1,9 @@
 ---------------------------------------------------------------------------------------------------
+Version: 0.3.8
+Date: 2022-07-25
+  Changes:
+    - Tech tree tweak to smooth unlocks.
+---------------------------------------------------------------------------------------------------
 Version: 0.3.7
 Date: 2022-07-23
   Changes:
diff --git a/info.json b/info.json
index 4056d00..0e51482 100644
--- a/info.json
+++ b/info.json
@@ -1,6 +1,6 @@
 {
     "name": "bzcarbon",
-    "version": "0.3.7",
+    "version": "0.3.8",
     "factorio_version": "1.1",
     "title": "Graphite & Diamonds",
     "author": "Brevven",