diff --git a/module/item-sort.js b/module/item-sort.js
index 6bff1c59..1ebf950b 100644
--- a/module/item-sort.js
+++ b/module/item-sort.js
@@ -114,7 +114,7 @@ export class RdDItemSort extends Item {
     let bonusCaseList = this.buildBonusCaseList(sort.data.bonuscase, false);
     for( let bc of bonusCaseList) {
       if (bc.case == coordTMR) { // Case existante
-        return bc.bonus;
+        return Number(bc.bonus);
       }
     }
     return 0;
diff --git a/system.json b/system.json
index 75b4da69..7aa5ee36 100644
--- a/system.json
+++ b/system.json
@@ -2,7 +2,7 @@
   "name": "foundryvtt-reve-de-dragon",
   "title": "Rêve de Dragon",
   "description": "Rêve de Dragon RPG for FoundryVTT",
-  "version": "1.2.30",
+  "version": "1.2.31",
   "manifestPlusVersion": "1.0.0",
   "minimumCoreVersion": "0.7.5",
   "compatibleCoreVersion": "0.7.8",