diff --git a/internal/service/vip/purchase_test.go b/internal/service/vip/purchase_test.go
index c04d7af..8bfc5ff 100644
--- a/internal/service/vip/purchase_test.go
+++ b/internal/service/vip/purchase_test.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"net/http"
+	"strings"
 	"testing"
 	"time"
 
@@ -129,6 +130,33 @@ func TestVipResourcePayloadAcceptsStringResourceID(t *testing.T) {
 	}
 }
 
+func TestVipLevelPayloadMarshalsIDAsString(t *testing.T) {
+	payload := payloadFromConfig(model.VipLevelConfig{
+		ID:          2049402425177018368,
+		SysOrigin:   "LIKEI",
+		Level:       1,
+		LevelCode:   "VIP1",
+		DisplayName: "VIP 1",
+		Enabled:     true,
+	})
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		t.Fatalf("marshal vip level payload: %v", err)
+	}
+	if !strings.Contains(string(body), `"id":"2049402425177018368"`) {
+		t.Fatalf("vip level id was not emitted as string: %s", body)
+	}
+
+	var decoded VipLevelPayload
+	if err := json.Unmarshal(body, &decoded); err != nil {
+		t.Fatalf("unmarshal vip level payload: %v", err)
+	}
+	if decoded.ID.Int64() != 2049402425177018368 {
+		t.Fatalf("decoded id = %d, want 2049402425177018368", decoded.ID.Int64())
+	}
+}
+
 func TestResourcePayloadUsesResourceGroupDetails(t *testing.T) {
 	row := model.VipLevelConfig{
 		Level:                 2,
diff --git a/internal/service/vip/types.go b/internal/service/vip/types.go
index 695630a..9aa2d07 100644
--- a/internal/service/vip/types.go
+++ b/internal/service/vip/types.go
@@ -83,7 +83,7 @@ type ConfigResponse struct {
 }
 
 type VipLevelPayload struct {
-	ID             int64              `json:"id"`
+	ID             ResourceID         `json:"id"`
 	Level          int                `json:"level"`
 	LevelCode      string             `json:"levelCode"`
 	DisplayName    string             `json:"displayName"`
@@ -365,7 +365,7 @@ func payloadFromConfigWithResources(row model.VipLevelConfig, resources vipResou
 		code = levelCode(row.Level)
 	}
 	return VipLevelPayload{
-		ID:             row.ID,
+		ID:             ResourceID(row.ID),
 		Level:          row.Level,
 		LevelCode:      code,
 		DisplayName:    displayName,