diff --git a/src/modifier/modifier-type.ts b/src/modifier/modifier-type.ts
index d88c396df7b..54484a1e0f8 100644
--- a/src/modifier/modifier-type.ts
+++ b/src/modifier/modifier-type.ts
@@ -1513,7 +1513,7 @@ export class ModifierTypeOption {
   constructor(type: ModifierType, upgradeCount: integer, cost: number = 0) {
     this.type = type;
     this.upgradeCount = upgradeCount;
-    this.cost = Math.round(cost);
+    this.cost = Math.min(Math.round(cost), Number.MAX_SAFE_INTEGER);
   }
 }
 
diff --git a/src/phases.ts b/src/phases.ts
index c7ff49e2e4c..ad4f52e55a0 100644
--- a/src/phases.ts
+++ b/src/phases.ts
@@ -4379,7 +4379,7 @@ export class SelectModifierPhase extends BattlePhase {
         baseValue += tierValues[opt.type.tier];
     } else
       baseValue = 250;
-    return Math.ceil(this.scene.currentBattle.waveIndex / 10) * baseValue * Math.pow(2, this.rerollCount);
+    return Math.min(Math.ceil(this.scene.currentBattle.waveIndex / 10) * baseValue * Math.pow(2, this.rerollCount), Number.MAX_SAFE_INTEGER);
   }
   
   getPoolType(): ModifierPoolType {