diff --git a/changelog.txt b/changelog.txt
index f09e313..851b2ff 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -9,6 +9,7 @@ Date: 13.5.2022
     - all building icons are now brighter
     - lowerd volume of some machines
     - made combined matter cheaper
+    - added another exotic kovarex recipe
     - reduced stack sizes of energy crystals and diesel fuels
     - increased stack size of neutron canisters
     - adjusted fusion reactor fluid inputs
diff --git a/migrations/248k-1.0.21.lua b/migrations/248k-1.0.21.lua
new file mode 100644
index 0000000..d8f6781
--- /dev/null
+++ b/migrations/248k-1.0.21.lua
@@ -0,0 +1,5 @@
+for _, force in pairs(game.forces) do
+    force.reset_recipes()
+    force.reset_technologies()
+    force.reset_technology_effects()
+end
\ No newline at end of file