diff --git a/lib/lotto.js b/lib/lotto.js
index 5cd2739..df4651a 100644
--- a/lib/lotto.js
+++ b/lib/lotto.js
@@ -86,7 +86,7 @@ class Lotto {
         const requestParams = lotteryInputs.map((lotto, idx) => {
             return {
                 genType: lotto === 'auto' ? '0' : '1',
-                arrGameChoiceNum: lotto === 'auto' ? null : lotto.map(num => String(num).padStart(2, 0)).join(','),
+                arrGameChoiceNum: lotto === 'auto' ? null : lotto.sort().map(num => String(num).padStart(2, 0)).join(','),
                 alpabet: String.fromCharCode(65 + idx)
             }
         })