diff --git a/routes/booster.js b/routes/booster.js
index 63f560c..7b0b799 100644
--- a/routes/booster.js
+++ b/routes/booster.js
@@ -10,9 +10,9 @@ function weightedRandom(weights) {
   let r = Math.random() * total;
   for (const entry of weights) {
     r -= entry.weight;
-    if (r <= 0) return entry.maxLevel;
+    if (r <= 0) return entry.rarity;
   }
-  return weights[weights.length - 1].maxLevel;
+  return weights[weights.length - 1].rarity;
 }
 
 /* ================================
@@ -20,34 +20,34 @@ function weightedRandom(weights) {
 ================================ */
 function getWeights(playerLevel) {
   if (playerLevel < 10) return [
-    { maxLevel: 1, weight: 85 },
-    { maxLevel: 2, weight: 15 },
+    { rarity: 1, weight: 85 },
+    { rarity: 2, weight: 15 },
   ];
   if (playerLevel < 20) return [
-    { maxLevel: 1, weight: 65 },
-    { maxLevel: 2, weight: 27 },
-    { maxLevel: 3, weight: 8  },
+    { rarity: 1, weight: 65 },
+    { rarity: 2, weight: 27 },
+    { rarity: 3, weight: 8  },
   ];
   if (playerLevel < 30) return [
-    { maxLevel: 1, weight: 55 },
-    { maxLevel: 2, weight: 26 },
-    { maxLevel: 3, weight: 13 },
-    { maxLevel: 4, weight: 6  },
+    { rarity: 1, weight: 55 },
+    { rarity: 2, weight: 26 },
+    { rarity: 3, weight: 13 },
+    { rarity: 4, weight: 6  },
   ];
   if (playerLevel < 40) return [
-    { maxLevel: 1, weight: 50 },
-    { maxLevel: 2, weight: 25 },
-    { maxLevel: 3, weight: 14 },
-    { maxLevel: 4, weight: 7  },
-    { maxLevel: 5, weight: 4  },
+    { rarity: 1, weight: 50 },
+    { rarity: 2, weight: 25 },
+    { rarity: 3, weight: 14 },
+    { rarity: 4, weight: 7  },
+    { rarity: 5, weight: 4  },
   ];
   return [
-    { maxLevel: 1, weight: 47   },
-    { maxLevel: 2, weight: 25   },
-    { maxLevel: 3, weight: 15   },
-    { maxLevel: 4, weight: 8    },
-    { maxLevel: 5, weight: 4.5  },
-    { maxLevel: 6, weight: 0.5  },
+    { rarity: 1, weight: 47   },
+    { rarity: 2, weight: 25   },
+    { rarity: 3, weight: 15   },
+    { rarity: 4, weight: 8    },
+    { rarity: 5, weight: 4.5  },
+    { rarity: 6, weight: 0.5  },
   ];
 }
 
@@ -82,10 +82,10 @@ router.post("/booster/open", async (req, res) => {
     );
     const playerLevel = account?.level ?? 1;
     const weights     = getWeights(playerLevel);
-    const maxAllowed  = Math.max(...weights.map(w => w.maxLevel));
+    const maxAllowed  = Math.max(...weights.map(w => w.rarity));
 
     const [allCards] = await db.query(
-      "SELECT id, name, image, icon, max_level, rarity, attack, defends, cooldown FROM cards WHERE max_level <= ?",
+      "SELECT id, name, image, icon, max_level, rarity, attack, defends, cooldown FROM cards WHERE rarity <= ?",
       [maxAllowed]
     );
 
@@ -93,11 +93,11 @@ router.post("/booster/open", async (req, res) => {
 
     const result = [];
     for (let i = 0; i < 5; i++) {
-      const targetLevel = weightedRandom(weights);
-      let pool = allCards.filter(c => c.max_level === targetLevel);
+      const targetRarity = weightedRandom(weights);
+      let pool = allCards.filter(c => parseInt(c.rarity) === targetRarity);
       if (!pool.length) {
-        for (let fb = targetLevel - 1; fb >= 1; fb--) {
-          pool = allCards.filter(c => c.max_level === fb);
+        for (let fb = targetRarity - 1; fb >= 1; fb--) {
+          pool = allCards.filter(c => parseInt(c.rarity) === fb);
           if (pool.length) break;
         }
       }