diff --git a/module/token.js b/module/token.js
index aca893a..ec38638 100644
--- a/module/token.js
+++ b/module/token.js
@@ -9,7 +9,7 @@ export class SimpleTokenDocument extends TokenDocument {
     const attr = alternative || this.data[barName]?.attribute;
     if ( !data || !attr || !this.actor ) return data;
     const current = foundry.utils.getProperty(this.actor.data.data, attr);
-    if ( "min" in current ) data.min = parseInt(current.min || 0);
+    if ( current?.dtype === "Resource" ) data.min = parseInt(current.min || 0);
     data.editable = true;
     return data;
   }
diff --git a/system.json b/system.json
index 4d1870f..4b9a092 100644
--- a/system.json
+++ b/system.json
@@ -2,7 +2,7 @@
   "name": "worldbuilding",
   "title": "Simple World-Building",
   "description": "A minimalist game system which provides configurable Actor and Item templates to support free-form system agnostic game-play.",
-  "version": "0.6.3",
+  "version": "0.6.4",
   "minimumCoreVersion": "0.8.9",
   "compatibleCoreVersion": "9",
   "author": "Atropos",
@@ -22,6 +22,6 @@
   "secondaryTokenAttribute": "power",
   "url": "https://gitlab.com/foundrynet/worldbuilding/",
   "manifest": "https://gitlab.com/foundrynet/worldbuilding/raw/0.6.x/system.json",
-  "download": "https://gitlab.com/foundrynet/worldbuilding/-/archive/release-063/worldbuilding-release-063.zip",
+  "download": "https://gitlab.com/foundrynet/worldbuilding/-/archive/release-064/worldbuilding-release-064.zip",
   "license": "LICENSE.txt"
 }