diff --git a/modules/sheets/pokemonCharacterSheet.js b/modules/sheets/pokemonCharacterSheet.js
index 1cf669f..e06facd 100644
--- a/modules/sheets/pokemonCharacterSheet.js
+++ b/modules/sheets/pokemonCharacterSheet.js
@@ -79,8 +79,8 @@ export default class pokemonCharacterSheet extends api.HandlebarsApplicationMixi
     }
 
     calculateDerivated(context) {
-        context.system.phArmorClass = 10+context.system.stats.defense;
-        context.system.spArmorClass = 10+context.system.stats.defense;
+        context.system.phArmorClass = 3+context.system.stats.defense;
+        context.system.spArmorClass = 3+context.system.stats.specialDefense;
         if (context.system.defenseCategory == "Physical") {
             context.system.phArmorClass += 2;
         } else {
diff --git a/system.json b/system.json
index aa47b42..dd7ae6f 100644
--- a/system.json
+++ b/system.json
@@ -1,5 +1,5 @@
 {
-    "version": "0.1.27",
+    "version": "0.1.28",
     "id": "pokemon",
     "title": "Pokémon TTRPG",
     "description": "A Pokémon TTRPG",
diff --git a/system.zip b/system.zip
index c2e160b..54ad727 100644
Binary files a/system.zip and b/system.zip differ