diff --git a/.vscode/settings.json b/.vscode/settings.json
index b176754..4a59410 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,6 +1,6 @@
 {
     "Lua.workspace.userThirdParty": [
-        "c:\\Users\\jangr\\AppData\\Roaming\\Code\\User\\workspaceStorage\\14f36f4acfd74cd0fa85ac34cb84b920\\justarandomgeek.factoriomod-debug\\sumneko-3rd"
+        "c:\\Users\\jangr\\AppData\\Roaming\\Code\\User\\workspaceStorage\\10b25691ccff2371b41fc57eb2e75361\\justarandomgeek.factoriomod-debug\\sumneko-3rd"
     ],
     "Lua.workspace.checkThirdParty": "ApplyInMemory",
     "factorio.versions": [
diff --git a/info.json b/info.json
index fa88bca..2ec0aef 100644
--- a/info.json
+++ b/info.json
@@ -1,6 +1,6 @@
 {
   "name": "factorio-metrics-exporter",
-  "version": "0.3.4",
+  "version": "0.3.5",
   "title": "Prometheus Metrics Exporter",
   "author": "Jan Grießhaber",
   "contact": "jan@griesshaber.systems",
diff --git a/pollution-stats.lua b/pollution-stats.lua
index b70b407..e32471f 100644
--- a/pollution-stats.lua
+++ b/pollution-stats.lua
@@ -57,10 +57,10 @@ function GetEvolution()
   for _, surface in pairs(game.surfaces) do
     evolutionParts[#evolutionParts + 1] = ("%s:%d:%d:%d:%d"):format(
       surface.name,
-      playerForce.get_evolution_factor(surface),
-      playerForce.get_evolution_factor_by_pollution(surface),
-      playerForce.get_evolution_factor_by_time(surface),
-      playerForce.get_evolution_factor_by_killing_spawners(surface))
+      playerForce.get_evolution_factor(surface.index),
+      playerForce.get_evolution_factor_by_pollution(surface.index),
+      playerForce.get_evolution_factor_by_time(surface.index),
+      playerForce.get_evolution_factor_by_killing_spawners(surface.index))
   end
   return table.concat(evolutionParts, "\n")
 end