diff --git a/module/simple.js b/module/simple.js
index 2f7e7c3..75da997 100644
--- a/module/simple.js
+++ b/module/simple.js
@@ -19,7 +19,10 @@ Hooks.once("init", async function() {
 	 * Set an initiative formula for the system
 	 * @type {String}
 	 */
-	CONFIG.initiative.formula = "1d20";
+	CONFIG.Combat.initiative = {
+	  formula: "1d20",
+    decimals: 2
+  };
 
   // Register sheet application classes
   Actors.unregisterSheet("core", ActorSheet);
diff --git a/system.json b/system.json
index f50d1f6..ef7fa83 100644
--- a/system.json
+++ b/system.json
@@ -2,14 +2,15 @@
   "name": "worldbuilding",
   "title": "Simple World-Building",
   "description": "A minimalist game system with very simple Actor and Item models to support free-form system agnostic gameplay.",
-  "version": 0.31,
+  "version": 0.32,
   "minimumCoreVersion": "0.4.4",
+  "compatibleCoreVersion": "0.5.0",
   "templateVersion": 2,
   "author": "Atropos",
   "esmodules": ["module/simple.js"],
   "styles": ["styles/simple.css"],
   "packs": [],
-  "initiative": "1d20",
+  "languages": [],
   "gridDistance": 5,
   "gridUnits": "ft",
   "primaryTokenAttribute": "health",