diff --git a/api/controller/OrderSingle.go b/api/controller/OrderSingle.go
index 80897da..02a4c64 100644
--- a/api/controller/OrderSingle.go
+++ b/api/controller/OrderSingle.go
@@ -63,11 +63,13 @@ func (b *OrderSingle) GetOrderSinglePage(c *gin.Context) {
 	isMember := userService.CheckUserMember(user)
 	if isMember == true {
 		for _, v := range orderSingles {
-			validDate := time.Time(*v.ValidDate)
-			memberExpireDate := time.Time(*user.MemberExpireDate)
-			diffTime := memberExpireDate.Sub(validDate)
-			if diffTime > 0 {
-				v.ValidDate = user.MemberExpireDate
+			if v.ValidDate != nil {
+				validDate := time.Time(*v.ValidDate)
+				memberExpireDate := time.Time(*user.MemberExpireDate)
+				diffTime := memberExpireDate.Sub(validDate)
+				if diffTime > 0 {
+					v.ValidDate = user.MemberExpireDate
+				}
 			}
 		}
 	}