diff --git a/mcbbs/vending-machine.user.js b/mcbbs/vending-machine.user.js
index 83dc80f..8b394a6 100644
--- a/mcbbs/vending-machine.user.js
+++ b/mcbbs/vending-machine.user.js
@@ -12,6 +12,7 @@
     let store = window.localStorage
     const lastOrderKey = 'circlebox:lastorder'
     let checkTimes = 0
+    let stock = 0
     async function sleep(time) {
         return new Promise((resolve, reject) => setTimeout(resolve, time))
     }
@@ -25,6 +26,7 @@
                     await shopAction(params)
                     break
                 case "mybox":
+                    stock = updateStock()
                     await myboxAction(params)
                     break
                 case "log":
@@ -79,7 +81,6 @@
         let messagetext = document.getElementById('messagetext')
         updateStatus(messagetext && messagetext.innerText || '')
         let count = 0
-        let stock = updateStock()
         let result = await fetch('https://reward.yumc.pw/mcbbs/needSendOrder').then(r => r.json())
         if (result.code != 200) {
             if (++checkTimes > 30 || back) {