diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/can/charge/ChargeService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/can/charge/ChargeService.kt
index 28b028e..f716c1b 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/can/charge/ChargeService.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/can/charge/ChargeService.kt
@@ -102,6 +102,11 @@ class ChargeService(
         return when (charge.payment?.status) {
             PaymentStatus.REQUEST -> {
                 // 성공 조건 검증
+                val mid = if (request.requestCurrency == "KRW") {
+                    payverseMid
+                } else {
+                    payverseUsdMid
+                }
                 val expectedSign = DigestUtils.sha512Hex(
                     String.format(
                         "||%s||%s||%s||%s||%s||",
@@ -110,11 +115,7 @@ class ChargeService(
                         } else {
                             payverseUsdSecretKey
                         },
-                        if (request.requestCurrency == "KRW") {
-                            payverseMid
-                        } else {
-                            payverseUsdMid
-                        },
+                        mid,
                         request.orderId,
                         request.requestAmount,
                         request.approvalDay
@@ -126,7 +127,7 @@ class ChargeService(
                 ) == 0
 
                 val isSuccess = request.resultStatus == "SUCCESS" &&
-                    request.mid == payverseMid &&
+                    request.mid == mid &&
                     charge.title == request.productName &&
                     isAmountMatch &&
                     request.sign == expectedSign