diff --git a/src/views/dashboard/components/waterCountByDeptBar.vue b/src/views/dashboard/components/waterCountByDeptBar.vue
index d072b9d..2efd0fd 100644
--- a/src/views/dashboard/components/waterCountByDeptBar.vue
+++ b/src/views/dashboard/components/waterCountByDeptBar.vue
@@ -132,7 +132,7 @@
       var tYear = today.getFullYear()
       var tMonth = today.getMonth()+1
       if (tMonth.toString().length == 1) {
-        tMonth = "0" + zero;
+        tMonth = "0" + tMonth;
       }
       const beginTime = tYear + "-" + tMonth + "-01"
       const endTime = getDayTime(new Date().getTime())